signals

started trainz up and for some reason i do not have any safetrain signal on all the routes i have them in.
went to content manager and it says"unable to link compiled script list".
the signals were there last night but not this morning?
help please
ejb

went to content manager and open the signals for edit. then recommited.
don't know what happened however so far it seems to have worked. all routes checked have the signals again.