[Zope] Photo does not regenerate displays

I have a site with lots of Photos that are grouped in a number of Photo Folders. I had one of the folder regenerating all display. Now next to the displays of all the photo "not generated" is displayed. When I try to access the pictures I do not get them anymore. And they are not generated neither. Zoë is V2.51 running unter Linux typing convert on the commandline starts convert so looks as if ImageMagick is working. what could be the problem? Robert mit freundlichen Grüssen Robert Rottermann Wir wollen Technik mit Menschlichkeit verbinden, um Menschen mit Technik zu erreichen. www.redcor.ch - die website www.redcor.net - zope trainings (and more)