Troubleshooting

A list of known issues and fixes is presented here.

• Python Error: ValueError: illegal value in argument 11 of internal sbevd

  Error message

  When calling the algebraic differentiators in Matlab the error

  >>> Python Error: ValueError: illegal value in argument 11 of internal sbevd
  

  can appread. In the Terminal where matlab has been called the following error message can be found:

  >>> Intel MKL ERROR: Parameter 11 was incorrect on entry to DSBEVD.
  

  Fix

  This error is because the Python code is incompatible with MATLAB’s MKL.

  This can be avoided by calling

  >>> py.sys.setdlopenflags(int32(bitor(int64(py.os.RTLD_NOW), int64(py.os.RTLD_DEEPBIND))));
  

  or

  >>> py.sys.setdlopenflags(int32(bitor(int64(py.os.RTLD_LAZY), int64(py.os.RTLD_DEEPBIND))));
  

  directly before any calls to py and after calls to pyenv. See this support answer. The simples fix is to add the lines to the startup script of matlab. This fixs has first been published on the archlinux wiki in section 4.25.