This message tells us that the CAD sheet indicated contains a block that puts an output block on block 0. This can be caused by using function code blocks in diagrams. For example, dropping NOT blocks on a picture looked good in one system, but caused many useless messages.
--Generating index: Module 2,01,02 Block Index Bogus source for block zero on 199030A.CAD
This error can be built directly into Hyperview. For more information, see the article Building error reports into the M14.