I'm not sure where to have put this question I hope it is in the right place. I have big problem with LaTeX.. I have been writing a document for a while and recently when I click the build and view button it shows this error [DocOpen(%bm.pdf")][FileOPen(%bm.pdf)] Cannot execute the command nothing comes up. Restarting doesn't help. Also when I have managed to see a pdf, (don't know how), it doesn't shows changes I made? I thought I had it when I looked at http://www.artofproblemsolving.com/Forum/viewtopic.php?t=42360 but I have followed the advice and no luck Help!