exporting does not work

Hi

Why am i not able to save to other file formats like STEP, IGS etc? I can chose it in the drop down menu but no file is saved. I have same problems both my computers who shares setting files, templates etc. I also have huge problem to import these file formats. It works sometimes but most not.

EDIT: Acctually .STL and .PRT  workes

Win 7 64, SW2014 SP4.0

SolidworksImport export