Synthesis Java Error in Linux

This is clearly a bug in DSP Builder. The stack trace doesn't give much information beyond that it's failing during validation of an entity.

Could you try paring down the design to see what elements cause the failure? E.g. one way to do this is to delete half the design and see if it works. If it does then the error is likely in the second half of the design so now recreate the design with just the second half and confirm that fails. Repeat until you have design that is both small and that you're happy to post on the forum so we can see what the error might be.