Hi,

either if I put a file "wrs_null.wrs" or "wrsnull.wrs" into my work-folder or if I load a resource with add_resource("wrs_null.wrs") or add_resource("wrsnull.wrs"), the engine crashes.

If I leave out the string "wrs" from the filename base, it works.

Aha! You're trying to add DLC tracks to Ackmania

Thanks for the info. This will be fixed - until then, avoid naming your wrs "wrs".