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System Coupling Fortran library 2025 R1

syscSystemCouplingF

Last update: 17.07.2025
1 module fortran
2 !
3 ! Copyright ANSYS, Inc.
4 ! Unauthorized use, distribution, or duplication is prohibited.
5 !
6 ! Provide free-form Fortran interface for
7 ! System Coupling Participant Library.
8 !
9 ! This interface file provides coupled analysis related APIs.
10 include 'syscElementTypesF.fi'
11 include 'syscCommonTypesF.fi'
12 include 'syscAttributeF.fi'
13 include 'syscInputScalarDataF.fi'
14 include 'syscInputVectorDataF.fi'
15 include 'syscOutputIntegerDataF.fi'
16 include 'syscOutputScalarDataF.fi'
17 include 'syscOutputVectorDataF.fi'
18 include 'syscInputComplexVectorDataF.fi'
19 include 'syscOutputComplexVectorDataF.fi'
20 include 'syscMeshDefinitionF.fi'
21 include 'syscSurfaceMeshF.fi'
22 include 'syscVolumeMeshF.fi'
23 include 'syscPointCloudF.fi'
24 include 'syscFunctionTypesF.fi'
25 include 'syscVariableF.fi'
26 include 'syscRegionF.fi'
27 include 'syscDataTransferF.fi'
28 include 'syscCouplingInterfaceF.fi'
29 include 'syscLegacyInterfacesF.fi'
30 !
31 !**********************************************************************
37 !**********************************************************************
38 !
41 function restartpointcreationintf() result (ret)
42  import :: syscfilepathlen
43  character(len=SyscFilePathLen) :: ret
44 end function restartpointcreationintf
45 !
46 end interface restartpointcreationintf
47 !
48 !**********************************************************************
50 !**********************************************************************
51 !
53 !
64 !
65  function syscstartstandaloneparallelf(communicator) result (ret)
66 !
67  import :: syscerrorf
68  integer(kind=4), intent(in) :: communicator
69  type(syscerrorf) :: ret
70 !
71 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
72 !DIR$ ATTRIBUTES DLLIMPORT :: syscStartStandaloneParallelF
73 !DIR$ ENDIF
74 !
75  end function syscstartstandaloneparallelf
76 !
77  end interface syscstartstandalonef
78 !
79 !**********************************************************************
81 !**********************************************************************
82 !
83 interface syscconnectf
84 !
109 function syscconnectf(scHost, &
110  scPort, &
111  participantName, &
112  buildInformation) result (ret)
113 !
114  import :: syscerrorf
115  integer(kind=4), intent(in) :: scport
116  character(*), intent(in) :: schost
117  character(*), intent(in) :: participantname
118  character(*), optional, intent(in) :: buildinformation
119  type(syscerrorf) :: ret
120 !
121 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
122 !DIR$ ATTRIBUTES DLLIMPORT :: syscConnectF
123 !DIR$ ENDIF
124 !
125 end function syscconnectf
126 !
151 function syscconnectparallelf(scHost, &
152  scPort, &
153  participantName, &
154  communicator, &
155  buildInformation) result (ret)
156 !
157  import :: syscerrorf
158  integer(kind=4), intent(in) :: scport
159  character(*), intent(in) :: schost
160  character(*), intent(in) :: participantname
161  integer(kind=4), intent(in) :: communicator
162  character(*), optional, intent(in) :: buildinformation
163  type(syscerrorf) :: ret
164 !
165 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
166 !DIR$ ATTRIBUTES DLLIMPORT :: syscConnectParallelF
167 !DIR$ ENDIF
168 !
169 end function syscconnectparallelf
170 !
171 end interface syscconnectf
172 !
173 !**********************************************************************
175 !**********************************************************************
176 !
177 interface syscaddregionf
178 !
194 function syscaddregionf(reg) result (ret)
195 !
196  import :: syscregionf
197  import :: syscerrorf
198  type(syscregionf), intent(in) :: reg
199  type(syscerrorf) :: ret
200 !
201 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
202 !DIR$ ATTRIBUTES DLLIMPORT :: syscAddRegionF
203 !DIR$ ENDIF
204 !
205 end function syscaddregionf
206 !
207 end interface syscaddregionf
208 !
209 !**********************************************************************
211 !**********************************************************************
213 !
230 !
231 function syscaddcouplinginterfacef(interface) result (ret)
232 !
233  import :: sysccouplinginterfacef
234  import :: syscerrorf
235  type(sysccouplinginterfacef), intent(in) :: interface
236  type(syscerrorf) :: ret
237 !
238 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
239 !DIR$ ATTRIBUTES DLLIMPORT :: syscAddCouplingInterfaceF
240 !DIR$ ENDIF
241 !
242 end function syscaddcouplinginterfacef
243 !
244 function syscaddcouplinginterfacef_a(interface, &
245  autoGenerateDataTransfers) result (ret)
246  !
247  import :: sysccouplinginterfacef
248  import :: syscerrorf
249  type(sysccouplinginterfacef), intent(in) :: interface
250  logical, intent(in) :: autogeneratedatatransfers
251  type(syscerrorf) :: ret
252  !
253  !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
254  !DIR$ ATTRIBUTES DLLIMPORT :: syscAddCouplingInterfaceF_A
255  !DIR$ ENDIF
256  !
257  end function syscaddcouplinginterfacef_a
258 !
259 end interface syscaddcouplinginterfacef
260 !
261 !**********************************************************************
263 !**********************************************************************
264 !
266 !
290 function syscaddinputvariablef(reg, var) result (ret)
291 !
292  import :: syscregionf
293  import :: syscvariablef
294  import :: syscerrorf
295  type(syscregionf), intent(in) :: reg
296  type(syscvariablef), intent(in) :: var
297  type(syscerrorf) :: ret
298 !
299 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
300 !DIR$ ATTRIBUTES DLLIMPORT :: syscAddInputVariableF
301 !DIR$ ENDIF
302 !
303 end function syscaddinputvariablef
304 !
305 end interface syscaddinputvariablef
306 !
307 !**********************************************************************
309 !**********************************************************************
310 !
312 !
337 function syscaddoutputvariablef(reg, var) result (ret)
338 !
339  import :: syscregionf
340  import :: syscvariablef
341  import :: syscerrorf
342  type(syscregionf), intent(in) :: reg
343  type(syscvariablef), intent(in) :: var
344  type(syscerrorf) :: ret
345 !
346 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
347 !DIR$ ATTRIBUTES DLLIMPORT :: syscAddOutputVariableF
348 !DIR$ ENDIF
349 !
350 end function syscaddoutputvariablef
351 !
352 end interface syscaddoutputvariablef
353 !
354 !**********************************************************************
356 !**********************************************************************
358 !
371 function sysccompletesetupf(setupInfo) result (ret)
372  import :: syscsetupinfof
373  import :: syscerrorf
374  type(syscsetupinfof), intent(in) :: setupinfo
375  type(syscerrorf) :: ret
376 !
377 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
378 !DIR$ ATTRIBUTES DLLIMPORT :: syscCompleteSetupF
379 !DIR$ ENDIF
380 !
381 end function sysccompletesetupf
382 !
383 end interface sysccompletesetupf
384 !
385 !**********************************************************************
388 !**********************************************************************
389 !
391 !
399 function syscregisterrestartpointcreationf(restCr) result (ret)
400 !
401  import :: syscerrorf
402  import :: restartpointcreationintf
403  procedure(restartpointcreationintf) :: restcr
404  type(syscerrorf) :: ret
405 !
406 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
407 !DIR$ ATTRIBUTES DLLIMPORT :: syscRegisterRestartPointCreationF
408 !DIR$ ENDIF
409 !
411 !
413 !
414 !**********************************************************************
416 !**********************************************************************
424 function syscregisterinputscalardataaccessf(dataAccess) result (ret)
425  import :: syscerrorf
427  procedure(syscinputscalardataaccessf) :: dataaccess
428  type(syscerrorf) :: ret
429 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
430 !DIR$ ATTRIBUTES DLLIMPORT :: syscRegisterInputScalarDataAccessF
431 !DIR$ ENDIF
434 !
435 !**********************************************************************
437 !**********************************************************************
445 function syscregisterinputvectordataaccessf(dataAccess) result (ret)
446  import :: syscerrorf
448  procedure(syscinputvectordataaccessf) :: dataaccess
449  type(syscerrorf) :: ret
450 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
451 !DIR$ ATTRIBUTES DLLIMPORT :: syscRegisterInputVectorDataAccessF
452 !DIR$ ENDIF
455 !
456 !**********************************************************************
458 !**********************************************************************
465 function syscregisteroutputscalardataaccessf(dataAccess) result (ret)
466  import :: syscerrorf
468  procedure(syscoutputscalardataaccessf) :: dataaccess
469  type(syscerrorf) :: ret
470 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
471 !DIR$ ATTRIBUTES DLLIMPORT :: syscRegisterOutputScalarDataAccessF
472 !DIR$ ENDIF
475 !
476 !**********************************************************************
478 !**********************************************************************
485 function syscregisteroutputvectordataaccessf(dataAccess) result (ret)
486  import :: syscerrorf
488  procedure(syscoutputvectordataaccessf) :: dataaccess
489  type(syscerrorf) :: ret
490 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
491 !DIR$ ATTRIBUTES DLLIMPORT :: syscRegisterOutputVectorDataAccessF
492 !DIR$ ENDIF
495 !
496 !**********************************************************************
499 !**********************************************************************
508  result(ret)
509  import :: syscerrorf
511  procedure(syscinputcomplexvectordataaccessf) :: dataaccess
512  type(syscerrorf) :: ret
513 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
514 !DIR$ ATTRIBUTES DLLIMPORT :: syscRegisterInputComplexVectorDataAccessF
515 !DIR$ ENDIF
518 !
519 !**********************************************************************
522 !**********************************************************************
531  result(ret)
532  import :: syscerrorf
534  procedure(syscoutputcomplexvectordataaccessf) :: dataaccess
535  type(syscerrorf) :: ret
536 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
537 !DIR$ ATTRIBUTES DLLIMPORT :: syscRegisterOutputComplexVectorDataAccessF
538 !DIR$ ENDIF
541 !
542 !**********************************************************************
544 !**********************************************************************
552 function syscregistersurfmeshaccessf(dataAccess) result (ret)
553  import :: syscerrorf
554  import :: syscsurfacemeshaccessf
555  procedure(syscsurfacemeshaccessf) :: dataaccess
556  type(syscerrorf) :: ret
557 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
558 !DIR$ ATTRIBUTES DLLIMPORT :: syscRegisterSurfMeshAccessF
559 !DIR$ ENDIF
560 end function syscregistersurfmeshaccessf
561 end interface syscregistersurfmeshaccessf
562 !
563 !**********************************************************************
565 !**********************************************************************
573 function syscregistervolumemeshaccessf(dataAccess) result (ret)
574  import :: syscerrorf
575  import :: syscvolumemeshaccessf
576  procedure(syscvolumemeshaccessf) :: dataaccess
577  type(syscerrorf) :: ret
578 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
579 !DIR$ ATTRIBUTES DLLIMPORT :: syscRegisterVolumeMeshAccessF
580 !DIR$ ENDIF
582 end interface syscregistervolumemeshaccessf
583 !
584 !**********************************************************************
586 !**********************************************************************
594 function syscregisterpointcloudaccessf(dataAccess) result (ret)
595  import :: syscerrorf
596  import :: syscpointcloudaccessf
597  procedure(syscpointcloudaccessf) :: dataaccess
598  type(syscerrorf) :: ret
599 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
600 !DIR$ ATTRIBUTES DLLIMPORT :: syscRegisterPointCloudAccessF
601 !DIR$ ENDIF
603 end interface syscregisterpointcloudaccessf
604 !
605 !**********************************************************************
608 !**********************************************************************
609 !
611 !
623 function syscinitializeanalysisf() result (ret)
624  import :: syscerrorf
625  type(syscerrorf) :: ret
626 !
627 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
628 !DIR$ ATTRIBUTES DLLIMPORT :: syscInitializeAnalysisF
629 !DIR$ ENDIF
630 !
631 end function syscinitializeanalysisf
632 !
633 end interface syscinitializeanalysisf
634 !
635 !**********************************************************************
638 !**********************************************************************
639 !
641 !
647 logical function syscdoiterationf()
648 !
649 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
650 !DIR$ ATTRIBUTES DLLIMPORT :: syscDoIterationF
651 !DIR$ ENDIF
652 !
653 end function syscdoiterationf
654 !
655 end interface syscdoiterationf
656 !
657 !**********************************************************************
660 !**********************************************************************
661 !
663 !
681 logical function syscdotimestepf()
682 !
683 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
684 !DIR$ ATTRIBUTES DLLIMPORT :: syscDoTimeStepF
685 !DIR$ ENDIF
686 !
687 end function syscdotimestepf
688 !
689 end interface syscdotimestepf
690 !
691 !**********************************************************************
693 !**********************************************************************
694 !
696 !
708 function syscgetcurrenttimestepf() result (timeStep)
709 !
710  import :: sysctimestepf
711  type(sysctimestepf) :: timestep
712 !
713 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
714 !DIR$ ATTRIBUTES DLLIMPORT :: syscGetCurrentTimeStepF
715 !DIR$ ENDIF
716 !
717 end function syscgetcurrenttimestepf
718 !
719 end interface syscgetcurrenttimestepf
720 !
721 !**********************************************************************
723 !**********************************************************************
724 !
726 !
744 function syscupdateinputsf() result (ret)
745  import :: syscerrorf
746  type(syscerrorf) :: ret
747 !
748 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
749 !DIR$ ATTRIBUTES DLLIMPORT :: syscUpdateInputsF
750 !DIR$ ENDIF
751 !
752 end function syscupdateinputsf
753 !
754 end interface syscupdateinputsf
755 !
756 !**********************************************************************
759 !**********************************************************************
760 !
762 !
765 function syscupdateoutputsf(convergenceStatus) result (ret)
766 !
767  import :: syscerrorf
768  integer(kind=4), intent(in) :: convergencestatus
769  type(syscerrorf) :: ret
770 !
771 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
772 !DIR$ ATTRIBUTES DLLIMPORT :: syscUpdateOutputsF
773 !DIR$ ENDIF
774 !
775 end function syscupdateoutputsf
776 !
777 end interface syscupdateoutputsf
778 !
779 !**********************************************************************
782 !**********************************************************************
783 !
785 !
788 function syscdisconnectf() result (ret)
789  import :: syscerrorf
790  type(syscerrorf) :: ret
791 !
792 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
793 !DIR$ ATTRIBUTES DLLIMPORT :: syscDisconnectF
794 !DIR$ ENDIF
795 !
796 end function syscdisconnectf
797 !
798 end interface syscdisconnectf
799 !
800 !**********************************************************************
803 !**********************************************************************
804 !
806 !
811 subroutine syscfatalerrorf(errorMessage)
812 !
813  character(*), intent(in) :: errorMessage
814 !
815 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
816 !DIR$ ATTRIBUTES DLLIMPORT :: syscFatalErrorF
817 !DIR$ ENDIF
818 !
819 end subroutine syscfatalerrorf
820 !
821 end interface syscfatalerrorf
822 !
823 !**********************************************************************
825 !**********************************************************************
827 !
847 function syscchecksurfacemeshvalidityf(surfaceMesh) result (ret)
848 !
849  import :: syscsurfacemeshf
850  import :: syscerrorf
851  type(syscsurfacemeshf) :: surfacemesh
852  type(syscerrorf) :: ret
853 !
854 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
855 !DIR$ ATTRIBUTES DLLIMPORT :: syscCheckSurfaceMeshValidityF
856 !DIR$ ENDIF
857 !
859 !
860 end interface syscchecksurfacemeshvalidityf
861 !
862 !**********************************************************************
864 !**********************************************************************
865 !
867 !
878 logical function syscwritesetupfilef(setupFileInfo)
879 !
880  import :: syscsetupfileinfof
881  type(syscsetupfileinfof), intent(in) :: setupfileinfo
882 !
883 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
884 !DIR$ ATTRIBUTES DLLIMPORT :: syscWriteSetupFileF
885 !DIR$ ENDIF
886 !
887 end function syscwritesetupfilef
888 !
889 end interface syscwritesetupfilef
890 !
891 !**********************************************************************
893 !**********************************************************************
894 !
896 !
898 function syscwriteresultsf(resultsInfo) result (ret)
899 !
900  import :: syscresultsinfof, syscerrorf
901  type(syscresultsinfof), intent(in) :: resultsinfo
902  type(syscerrorf) :: ret
903 !
904 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
905 !DIR$ ATTRIBUTES DLLIMPORT :: syscWriteResultsF
906 !DIR$ ENDIF
907 !
908 end function syscwriteresultsf
909 !
910 end interface syscwriteresultsf
911 !
912 !**********************************************************************
915 !**********************************************************************
916 !
918 !
924 function syscgetnumcouplinginterfacesf() result (ret)
925  integer(kind=8) :: ret
926 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
927 !DIR$ ATTRIBUTES DLLIMPORT :: syscGetNumCouplingInterfacesF
928 !DIR$ ENDIF
930 !
931 end interface syscgetnumcouplinginterfacesf
932 !
933 !**********************************************************************
935 !**********************************************************************
936 !
938 !
943 function syscgetnumregionsf() result (ret)
944  integer(kind=8) :: ret
945 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
946 !DIR$ ATTRIBUTES DLLIMPORT :: syscGetNumRegionsF
947 !DIR$ ENDIF
948 end function syscgetnumregionsf
949 !
950 end interface syscgetnumregionsf
951 !
952 !**********************************************************************
953 !! \brief Provide an interface to return added region given the
954 !! region index.
955 !**********************************************************************
956 !
958 !
959 !! \brief Provide a function to return added region given the
960 !! region index.
961 !!
962 !! \param[in] index - region index. Use syscGetNumRegionsF() to get
963 !! the number of regions.
964 !!
965 !! \return Region at specified index.
966 !!
967 function syscgetaddedregionf(index) result (ret)
968  import :: syscregionf
969  integer(kind=8) :: index
970  type(SyscRegionF) :: ret
971 !DIR$ IF DEFINED(_WIN32) .and. ( .not. DEFINED(SYSTEM_COUPLING_PARTICIPANT_PROXY))
972 !DIR$ ATTRIBUTES DLLIMPORT :: syscGetAddedRegionF
973 !DIR$ ENDIF
974 end function syscgetaddedregionf
975 !
976 end interface syscgetaddedregionf
977 !
978 end module fortran
Provide function interface for creating restart points.
Provide an interface to add a coupling interface.
Provide an interface to add an input variable.
Provide an interface to add an output variable.
Provide an interface to add a region.
Provide an interface to perform simple mesh validity checks.
Provide an interface to complete the setup.
Provide an interface to connect to System Coupling.
Provide an interface to end the analysis and disconnect from System Coupling.
Provide an interface to check whether to do a coupling iteration.
Provide an interface to check whether to do another coupling time step.
Provide an interface to notify System Coupling of a fatal error.
Provide an interface to get current time step.
Provide an interface to return the number of added coupling interfaces.
Provide an interface to return the number of added regions.
Provide an interface to notify System Coupling that analysis initialization can be completed.
Provide function interface for access to input complex vector data.
Provide function interface for access to input scalar data.
Provide function interface for access to input vector data.
Provide function interface for access to output complex vector data.
Provide function interface for access to output scalar data.
Provide function interface for access to output vector data.
Provide function interface for access to point cloud.
Provide an interface to register input complex vector data access.
Provide an interface to register input scalar data access.
Provide an interface to register input vector data access.
Provide an interface to register output complex vector data access.
Provide an interface to register output scalar data.
Provide an interface to register output vector data access.
Provide an interface to register point cloud access.
Provide an interface to register restart point creation callback.
Provide an interface to register surface mesh access.
Provide an interface to register volume mesh access.
Provide a function interface to start in standalone mode.
Provide function interface for access to surface mesh.
Provide an interface to update the input variables.
Provide an interface to update the participant's output variables.
Provide function interface for access to volume mesh.
Provide an interface to write results.
Provide an interface to write the setup file.
Provide a struct for a coupling interface.
Provide an error type returned by the Fortran interface calls.
Provide a struct for a System Coupling region.
Definition: syscRegionF.fi:29
Provide a type for writing results files.
Provide a type for writing System Coupling setup files.
Provide a type for System Coupling setup information.
Provide a surface mesh access type.
Provide a time step type.
Provide a struct for a System Coupling variable.

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