Thank you both for responding. I can’t imagine I’m the only one suffering from this, but I have not seen much traffic in the BLOGosphere.
1. Regarding Backward Capability: I have MSP2010 Professional, but am not using PWA features on server. Because the Inactivate Task (and Auto/Manual Schedule toggle) seems to work under some circumstances, I don’t think turning off the Backward Capability Mode should be necessary. Do you agree?
2. Regarding AFridelle’s comment: I agree that a legacy project file – say MSP2007 – should open in MSP2010 Professional and then I should be able to simply convert using SAVE AS an MSP2010 Project file. I’ve manually SAVED AS the files anyway, but that didn’t fix my problem.
3. I am open to suggestions. I fear I must copy the projects into a working template, which will be a lot of work and possibly introduce corruptions in my data. I have a MASTER and 12 SUBPROJECTS hammocked to that master with EXTERNAL links between the subprojects. I’ll need to validate all that data.