File Rcopper.cre, which is a file of a mage from Marchon's group, got corrupted upon compression. That is why area TT4004 crashes. Please download the following file and move it to your override:

http://vlad.blackwyrmlair.net/files/Rcopper.cre

Name of Reise Coppersky may be messed but it's a fast fix without WeiDU(ing).