I'm porting some of my code to py3k, and I started from the C size. After this, all extensions compiled fine, but after a 'setup.py install', I got the following: File "/usr/local/python/3.0/lib/python3.0/distutils/util.py", line 498, in byte_compile compile(file, cfile, dfile) File "/usr/local/python/3.0/lib/python3.0/py_compile.py", line 127, in compile py_exc = PyCompileError(err.__class__,err.args,dfile or file) File "/usr/local/python/3.0/lib/python3.0/py_compile.py", line 48, in __init__ tbtext = ''.join(traceback.format_exception_only(exc_type, exc_value)) File "/usr/local/python/3.0/lib/python3.0/traceback.py", line 196, in format_exception_only lines.append("%s: %s\n" % (stype, str(msg))) UnboundLocalError: local variable 'msg' referenced before assignment At this point, I had not updated my python code, so it surelly had some py3k-invalid things. Looking at 'traceback.py', it seems there is something wrong in 'format_exception_only', so this error. -- Lisandro Dalcín --------------- Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC) Instituto de Desarrollo Tecnológico para la Industria Química (INTEC) Consejo Nacional de Investigaciones Científicas y Técnicas (CONICET) PTLC - Güemes 3450, (3000) Santa Fe, Argentina Tel/Fax: +54-(0)342-451.1594