I got the same error message on wine like you on windows 2003. WINEPREFIX=~/.wine_dxf wine dwg2vec.exe test1.dwg kliitest1.pdf You have 496 time to evaluate this product, you may purchase a full version from http://www.verypdf.com or http://www.verydoc.com web site. test1.dwg ==> kliitest1.pdf fixme:atl:AtlModuleInit SEMI-STUB (0x11aeec8 0x114bcd0 0x980000) Conversion fail (test1.dwg).