I suggest you examine the DDR for a script with an Install OnTimer Script step that installs a non-existing script – which seems to only fail on attempted execution, not the install self.
which i cannot replicate
Select a script for OnTimer installation, delete it, then have it installed; the next execution call will bring up that dialog.
thanx - it appears that it is an ontimer script which got evoked when connecting to a remote file and that file already has been closed. - now i am trying before closing the remote file to explicitly close all of its windows first
before closing command. hope that fixes it. somehow it s like a ghost ontimer since on the single window left there is no ontimer script called.