Can anyone explain why this fails? This piece of code runs perfectly using weave.inline and type_converters = blitz.. Obviously it can't handle 2D arrays anymore. It's just a stupid example to illustrate that. Thanks, Soren CODE : ------------------------------------------------------------------------------------------------ mod = ext_tools.ext_module('ravg_ext') test = zeros((5,5)) xlen = 5 ylen = 5 code = """ int x, y; for( x = 0; x < xlen; x++) { for( y = 0; y < ylen; y++) { test(x,y) = 2; } } """ ravg = ext_tools.ext_function('ravg', code, ['xlen', 'ylen', 'test']) mod.add_function(ravg) mod.compile(compiler = 'gcc') RESULT: ------------------------------------------------------------------------------------------------ C:\Temp\ravg_ext.cpp: In function `PyObject* ravg(PyObject*, PyObject*, PyObject*)': C:\Temp\ravg_ext.cpp:654: error: `test' cannot be used as a function C:\Temp\ravg_ext.cpp:641: warning: unused variable 'Ntest' C:\Temp\ravg_ext.cpp:642: warning: unused variable 'Stest' C:\Temp\ravg_ext.cpp:643: warning: unused variable 'Dtest' Traceback (most recent call last): File "C:\Temp\ravg_extension.py", line 132, in ? build_ravg_extension() File "C:\Temp\ravg_extension.py", line 125, in build_ravg_extension mod.compile(compiler = 'gcc') File "C:\Python24\Lib\site-packages\scipy\weave\ext_tools.py", line 365, in compile verbose = verbose, **kw) File "C:\Python24\Lib\site-packages\scipy\weave\build_tools.py", line 269, in build_extension setup(name = module_name, ext_modules = [ext],verbose=verb) File "C:\Python24\Lib\site-packages\numpy\distutils\core.py", line 184, in setup return old_setup(**new_attr) File "C:\Python24\Lib\distutils\core.py", line 166, in setup raise SystemExit, "error: " + str(msg) CompileError: error: Command "g++ -mno-cygwin -O2 -Wall -IC:\Python24\lib\site-packages\scipy\weave -IC:\Python24\lib\site-packages\scipy\weave\scxx -IC:\Python24\lib\site-packages\numpy\core\include -IC:\Python24\include -IC:\Python24\PC -c C:\Temp\ravg_ext.cpp -o c:\docume~1\ssn\locals~1\temp\ssn\python24_intermediate\compiler_894ad5ed761bb51736c6d2b7872dc212\Releas