Error exporting fmu of rtwsfcnfmi.tlc using matlab 2021b

[qilianshanlgz]

Error: File: C:\FMIKit-Simulink-3.0-alpha.4\rtwsfcnfmi\rtwsfcnfmixml.tlc Line: 116 Column: 36
Unable to find CGTypeIdx within the DataType scope

[t-sommer]

Can you provide steps to reproduce the problem?

[qilianshanlgz]

Can you provide steps to reproduce the problem?
Thank you for your reply.
Step1：open simulink model；
Step2：ctrl+E→Code Generation→System target file：rtwsfcnfmi.tlc
Step3：ctrl+B
Step4：Then，The following error message is displayed：
=========================================================
Writing source file rtGetInf.c

TLC code generation complete.

Writing modelDescription.xml

Error: File: C:\FMIKit-Simulink-3.0-alpha.4\rtwsfcnfmi\rtwsfcnfmixml.tlc Line: 116 Column: 36
Unable to find CGTypeIdx within the DataType scope
Main program:
==> [00] C:\FMIKit-Simulink-3.0-alpha.4\rtwsfcnfmi\rtwsfcnfmixml.tlc:(116)
Error: File: C:\FMIKit-Simulink-3.0-alpha.4\rtwsfcnfmi\rtwsfcnfmixml.tlc Line: 116 Column: 36
Unable to find CGTypeIdx within the DataType scope
Main program:
==> [00] C:\FMIKit-Simulink-3.0-alpha.4\rtwsfcnfmi\rtwsfcnfmixml.tlc:(116)
Error: File: C:\FMIKit-Simulink-3.0-alpha.4\rtwsfcnfmi\rtwsfcnfmixml.tlc Line: 116 Column: 36
Unable to find CGTypeIdx within the DataType scope
Main program:
==> [00] C:\FMIKit-Simulink-3.0-alpha.4\rtwsfcnfmi\rtwsfcnfmixml.tlc:(116)
Error: File: C:\FMIKit-Simulink-3.0-alpha.4\rtwsfcnfmi\rtwsfcnfmixml.tlc Line: 116 Column: 36
Unable to find CGTypeIdx within the DataType scope
Main program:
==> [00] C:\FMIKit-Simulink-3.0-alpha.4\rtwsfcnfmi\rtwsfcnfmixml.tlc:(116)
Build Summary
Top model targets built:

Model Action Rebuild Reason

controller Failed Code generation information file does not exist.

0 of 1 models built (0 models already up to date)
Build duration: 0h 0m 6.805s
Error: File: C:\FMIKit-Simulink-3.0-alpha.4\rtwsfcnfmi\rtwsfcnfmixml.tlc Line: 116 Column: 36
Unable to find CGTypeIdx within the DataType scope

If the 'System target file' was 'grtfmi.tlc', the fmu file can be builded successfully.