I have been able to save drawings as PDF for several days.  Now it just stopped working, and I have to use jpg or tif to get by.  I am able to go thru the motions of selecting folder location and input of the file name.  But after pushing the save button, nothing additional happens, it won't even try to open the file despite the tickbox being checked to open after save.  And nothing shows up in the folder.  Any thoughts?  Anyone else have this issue?