I have Abaqus 2023 (HF8). It is not able to compile user subroutine C++ files or object files.

I discovered that Abaqus is now searching for any subroutine names in these files even before compiling and linking, which was not the case for previous versions and I believe this is causing the issues.

In general, for C++, in Linux, we need to have names of the subroutine ending with "_" so that it gets called at runtime properly e.g. (umat_(.....)) instead of umat(...) which Abaqus seems to be searching for. 

For object files, there is no text inside and hence the abaqus is not able to search for any names and fails to go ahead and link.

Does anyone know where can one submit a bug request to Abaqus?