Possible bug or unexpected behavior observed in v3.9.68 in source file index.cpp around line ~5809 related to the string "%21%21TOP%21%21" (URL-encoded "!!TOP!!"). Report summarizes context, reproduction assumptions, impact, root-cause hypothesis, and recommended fixes.

Apply any third-party patches (like Nick+Co’s) after the database is in place.

index.cpp:5809 could be inside a loop or a message dispatcher. The !!TOP!! might indicate the or the entry point of a critical section. Version v3.9.68 suggests an internal build. If you see this repeatedly, it might be a heartbeat log or a spammy debug leftover.

Technical Report: Resolving the "v3.9.68 index..cpp 5809" Error in CM 01/02 1. Abstract

Walk through using to fix specific save game bugs.