Hello Freddie,
and thank you for the answer.
Indeed, I already attempted prepending the path to libxsmm.so to my LD_LIBRARY_PATH but that did not make any changes. I also tried exporting the PYFR_XSMM_LIBRARY_PATH (as I read in the thread in https://pyfr.discourse.group/t/pyfr-on-xeon-phi/165/4) but still no changes in the KeyError.
It seems that I am forced to set gimmik-max-nnz = 8192 in the config file to make that simulation running and that is quite strange to my eyes…
Is there any way in which I can check that if I use the libxsmm and set gimmik-max-nnz at the same time, then PyFR will actually use libxsmm for the gemm?