You need to recompile your Macros table
Messages > Design-Time Messages > DiaryGridLines >
Cause : This message occurs after a Q++ Studio update to force you recompile your Macros to ensure they are still compatible and optimized for the new compiler installed with the latest update.
Consequences : Q++ will not let you preview or generate a diary until this problem is fixed, at least for the Macros of the current script.
•Re-Compile All Macros : Re-compiles all the Macros in the shared database.