Code generation assertion '-1 < fDTypeID' failed in 'b:\matlab\src\slcg_impl\export\include\slcg_impl\rtwgen\rtwsignal.hpp:207'
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when generate code, an issue occured, Code generation assertion '-1 < fDTypeID' failed in 'b:\matlab\src\slcg_impl\export\include\slcg_impl\rtwgen\rtwsignal.hpp:207'
I don't know how to identify the root cause of this failure, could you kindly give some suggestions, thank you.
回答（1 个）
Harsh
2025-2-28
Hi
The error "Code generation assertion '-1 < fDTypeID' failed" in MATLAB typically occurs due to data type mismatches within a muxed signal during code generation. This issue may arise when:
- A Mux block contains signals of different data types.
- Specific optimizations in code generation interact with this mismatch, leading to an assertion failure.
To resolve this error, please consider following workarounds-
- Use a Bus Instead of a Mux: Replace the Mux block with a Bus Creator block, as buses can handle signals of different data types properly.
- Ensure Consistent Data Types: If using a Mux, make sure all input signals have the same data type. Use a Signal Specification block to enforce uniform data types before the Mux.
- Use a Demux: If necessary, use a Demux block to separate signals before re-processing them into a bus.
Please use the following command to open documentation for Demux, Mux and Simulink.Bus :
doc Demux
doc Mux
doc Simulink.Bus
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