info: in konqueror fails

Good day everyone, when I try to open info:coreutils/dd invocation in konqueror it fails with this error message: An error occurred while loading info:coreutils/dd invocation: Could not start process '/usr/bin/perl' '/opt/trinity/share/apps/tdeio_info/kde-info2html' '/opt/trinity/share/apps/tdeio_info/kde-info2html.conf' '/opt/trinity/share/icons/crystalsvg/22x22/actions' 'coreutils' 'dd invocation'. The mentioned files are all there. I may miss some package which I haven't installed as this is a new system but I can't figure out which one. Any advice or hint would be much appreciated. Thanks, Stefan