This message tells you that the same block is being tested more than once. This nearly always means that a TSTALM block was cloned, its output block changed, but the value of S1 left untouched.
This message shows two problems:
--Module 6,70,03 TSTALM Report Module 6,70,03 Block 1529 is tested by multiple TSTALM blocks (mode 2).
This error can be built directly into Hyperview. For more information, see the article Building error reports into the M14.