I have a design that I can import without any problems into Voltus 14,16, and 18. However, during the defIn phase in Voltus 20, the tool simply gets stuck with full CPU utilization and never continues. More specifically, this happens at the point of the DEF import where the other versions start resolving the instantiated cells by using the lef libraries given to the tool earlier.
There is absolutely no debug information available from Voltus, so has anyone ever solved this issue before or can point me a possible problematic parts of the def that I should have a look at?
Thanks a lot in advance.
you can try the steps described here to debug the hang: Debugging crash, stack trace, and hang in Innovus/Tempus
If none of this helps, you will have to contact Cadence support to get help.