I'm relatively new to Solidworks. I basically use it to convert *.stl files into *.x_t files to use in ADINA. The lab I work at just got the 2007 sp0.0 version of Solidworks and I was trying convert some files to parasolid, but I got an error saying "The file could not be saved because the part's geometry is not valid for this type of save operation. I tried other .stl files but they all gave the same error. Any help?