Hi Doug
I have seen that message after a hard disk crash corrupted some files, had to rebuild the project interface.
For the error messages about eg TMAIN1 see the project SPR file in the project source directory, open it with Text Editor - do not doubleclick it as that will start WDSibyl instead. You will probably find you need to manually add in any missing paths especially in the section called [Project Files].
Hope the above is of help
Pete