After I release a solidworks part or assembly, there is no bitmap image saved. So when I'm looking through a folder as large icons they are not displayed. When clicking on the part or assembly to see it in the preview window it tells me there is no bitmap preview. When show bitmap in preview window is turned off and I click the file to show the edrawings preview there is text in the preview window stating "The file displayed is out of date. It needs to be rebuit in SolidWorks (more...)" though I have tried this several times and after each rebuild, save, and release it does not fix the problem. Does anyone have any idea what might be going on here or whats wrong?