Simulink Coder Fatal: The data type 'CAN_DATATYPE' is not supported because it has no CustomCast function.

I am receiving the following error when building a simulink model

'Error: File: C:\Program Files\MATLAB\R2018b\rtw\c\tlc\lib\utillib.tlc Line: 1526 Column: 8 %exit directive: Simulink Coder Fatal: The data type 'CAN_DATATYPE' is not supported because it has no CustomCast function.'

I am unsure how to fix this or why it is occurring

Answer 1

[Dhruv]

The Simulink Coder throws this error when it encounters a custom data type in the model that it does not know how to handle which in this scenario is 'CAN_DATATYPE'. To help solve the above issue, Simulink Coder requires a CustomCast function to be defined for any custom data types that it detects in the model and it appears that this function is missing for the 'CAN_DATATYPE' data type. The function takes an input value of the custom data type and returns a value that is supported by Simulink Coder.