You might have something set incorrect in the submarine's upcge file for the C3. As for a crash at or near Kure, that could be related to that problem. However, to help you out with some of the checks you might want to perform to make certain you don't have other errors, I would suggest downloading Hebe Vollmaus's mySH3-Tool and run it on your SH4 folder. It is a bit difficult for a first time user to come to grips with it, but well worth the effort. For checking Rosters and Campaign files, TDW aka:TheDarkWraith's SH Validator. It is a bit easier to understand it, but be sure and read all of both of those tools' documentation. Hebe frequents the SH3 threads, which is what his program was originally written for, but TDW no longer hangs out here. :salute: