https://forums.autodesk.com/t5/inventor-forum/error-loading-segment-pmbrepsegment-in-datatbase/m-p/5714128#M368839 <P>It appears you have corruptions within your file.&nbsp;&nbsp; Here's some info: <A href="http://knowledge.autodesk.com/support/inventor-products/troubleshooting/caas/sfdcarticles/sfdcarticles/Opening-data-generates-Error-loading-segment-PmBrepSegment-in-datatbase.html" target="_blank">http://knowledge.autodesk.com/support/inventor-products/troubleshooting/caas/sfdcarticles/sfdcarticles/Opening-data-generates-Error-loading-segment-PmBrepSegment-in-datatbase.html</A></P><P>&nbsp;</P><P>&nbsp;</P><P>Although you have Inventor 2011, I think you said that you still can't open it using that version.&nbsp; At this point I think you would have to start from the beginning and create this part.&nbsp;&nbsp; You may also want to check your oldversion folder where your part resides and see if the last version of that part can be opened.</P> Fri, 10 Jul 2015 11:46:05 GMT Mark.Lancaster 2015-07-10T11:46:05Z