Unexpected or internal error encountered in createMismatchError: Incorrect Enum error type

I encountered the following error when generating code for my model in R2021b:

 

Unexpected or internal error encountered in "in CGIR: B:\matlab\toolbox\shared\slcc\src\slcc_blocks\src\slcc_blocks_utils.cpp line 398: In createMismatchError: Incorrect Enum error type". Please report this to MathWorks if you can cause it to recur

When I try the same model in R2022a, I get the following error:

 

Value of enumeration elements specified for symbol 'Name' for C Function block does not match the symbol's type in the custom code. Check the enumeration definition for 'Filename' in Configuration Parameters > Simulation Target pane.

Answer 1

[MathWorks Support Team]

That error happens because the enum values in MATLAB don't match the enum values defined in their C Code. For example, if the MATLAB enum values range from 1-10 and the enum values in the C code range from 0-9, this causes the error. So to resolve the error, the two options are:

1. Modify the MATLAB enum to go from 0-9
2. Modify the C enum to go from 1-10

In essence, making the enum values match will resolve the error.