This application has requested the Runtime to terminate it in an unusual way Please contact the application's support team for more information.
Error creating <design>_tb.vhd. Defaulting to boilerplate test bench."
This can happen if the targeted VHDL file is using a generic that does not have a default value:
A Project Navigator subprogram handling the test bench creation does not properly handle a generic without an initial value. Adding an initial value in the VHDL code prevents the crash and allows a correct test bench to be created.