The preview window in Explorer and the View option in PDM History are both often used when reviewing files because SOLIDWORKS eDrawings is not associated properly to preview. You may be presented with the error below or with a blank display. This is indicating that the location for the needed viewer tool is not valid for the right application. In some cases, it’s pointing to an older viewer that cannot preview the newer versions of the files. In either event, you need to have it corrected inside of the SOLIDWORKS PDM Administration tool.