Something strange is happening here: When I want to upload a file, I get the above mentioned error. I went a little bit into debugging the error by having a look at the code: in /var/www/pve/apl/index.htm there is a call "install_template($tmpname, $fn);" I added a line $out .= "tmpname: $tmpname; fn: $fn"; to see, If the arguments are paeed correctly: they are. However, $filename never arrives in "sub install_template" in Config.pm, I can do what I want - @_ only contains $tmpname but *NEVER* $filename. Everywhere else it works fine. Do you have a clue what could cause this, or how/where to poke further? Best regards, Felix P.S. Access to the server can be provided if needed.