https://forums.autodesk.com/t5/inventor-forum/automating-conversion-of-step-files-to-inventor-files/m-p/5895342#M354389 <P>Programming questions should be posted over in the Inventor Customization Forum: <A href="https://knowledge.autodesk.com/support/inventor-products/troubleshooting/caas/sfdcarticles/sfdcarticles/Error-1603-during-installation-of-Autodesk-software.html" target="_blank">https://knowledge.autodesk.com/support/inventor-products/troubleshooting/caas/sfdcarticles/sfdcarticles/Error-1603-during-installation-of-Autodesk-software.html</A></P> <P>&nbsp;</P> <P>However my first question is, what version of Inventor are you using?&nbsp; If its 2016, the handling of importing STEP files is different now due to the ANYCAD technology.&nbsp; Which means the STEP file can be imported as a reference file or converted to an IPT/IAM depending on what the STEP file is composed of.</P> Thu, 05 Nov 2015 22:33:25 GMT Mark.Lancaster 2015-11-05T22:33:25Z