Hi Casey, I registered the .dtml for the editor "E:\EditPlus\editplus.exe" but with no effect. So I changed the ZopeEdit.ini: ---- snip (I tried with and without "" no change) editor = "E:\EditPlus\editplus.exe" ----- snip [meta-type:DTML Document] extension=.dtml [meta-type:DTML Method] extension=.dtml [meta-type:Script (Python)] extension=.py [meta-type:Page Template] extension=.pt --- snip this is the content of the last zopeedit traceback file (but they aren't generated everytime it fails because there were only two of them and I tried often): Traceback (most recent call last): File "<string>", line 732, in ? IndexError: list index out of range Thanks a lot for your effords, Elena You wrote: If you are trying to edit dtml or zpt objects, you may need to register the .dtml and .pt file extensions with Windows or alternately specify the editor in the ZopeEdit.ini file. Also, look in you temp directory for zopeedit traceback files. If you see one or more, send the most recent one to me and I will look into it for you. hth, -Casey