The get_coordinates routine (onera_desp_lib.f, line 948), which is called by numerous other routines including make_Lstar, does not support sysaxes values above 8. It is particularly troublesome as spacepy will sometimes use for instance sysaxes=12 instead of sysaxes=5 (which, according to the documentation, should be equivalent).
It should be straightforward to fix this by looking at Coordtrans.f.