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Martin Rommel wrote: > > Not long after installing (and the same after reinstalling after > changing to NTFS) Mathematica 3.01 on an NT 4.0 machine the file > extension mapping broke. Double clicking a notebook file produces an > error that Mathematica cannot find the file "tica.exe". It seems the > long file names with spaces do not get handled properly. Since > Mathematica is the only program with that problem I suspect it. Any > help? > > Another nuisance is that after closing the help browser the editing > window does not become active again until I click it. -- > \\\\ //// C-@,@ J. Martin > Rommel (firstname.lastname@example.org) @/@-o "\ -/ > \o /* I doubt that file extension mapping is completely broken. I've seen this kind of error message before, and, in the context that I've seen it, it only happens when you're already running Mathematica and you double-click on a notebook file. Try double-clicking on the same files while Mathematica isn't running; if this works just fine, then your associations are fine, and you're running into a bug which happens only under Windows NT. If your associations are genuinely broken, email me back, and I'll walk you through setting up associations manually. This bug and the focus issues you mentioned are being addressed for future releases of Mathematica. John Fultz email@example.com Front End Group Wolfram Research, Inc.