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Instead of copying the project over to a new directory, have you tried simply disabling, at least temporarily, Signal Tap from the project Settings? If you can synthesize the design without Signal Tap, then something is messed up in your .stp file. Are you trying to tap pre-synthesis or post-fit nodes? In most cases that I've found, pre-synthesis is the way to go.
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Yes I have, without success.
The suggestion by Rysc works :
1) They were able to get around it by turning off Parallel Synthesis.
I run Analysis & Synthesis with only 1 CPU.
After that I can change back to using all available CPU's again.
I can continue with fitter, or run from Analysis & Synthesis.
I dont need to change any probes.
It seems to me that the database is corrupted and by running Analysis & Synthesis with 1 CPU the error in the database is corrected.
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