CTD on return to base

[Lugworm]

Hi anybody any ideas on this problem, I am on patrol 25 in my latest career and every time I click on the return to base button I get a CTD. I have played patrol 25 twice now and it’s happened both times.

A little background info, around patrol 22 I changed to a type VIIC, I had no probs with my set up except for the odd game save crash right from patrol 1. On patrol 25 I changed to a different conning tower, one with 2 flack positions, all sorts of probs now started to occur. CTDs in game, lots of game save crashes on starting, I ended up deleting patrol 25 and starting again also going back to a type VIIB.

Started patrol 25 again played a few days and started having game save crashes starting the game in mid patrol, I found out sometimes they would load if I started SH3 without commander. I also had some weird convoy behaviour with some MFM ships (cam ships) set like blocks of granite and unmoving in a stormy sea, one with another MFM embedded in its side as though it had had a collision, Later the cam ships disappeared and the embedded ship was free to sail on. After a week of patrol 25, odd behaviour and CTDs on start up I finally tried to exit the patrol, I clicked on the return to base button and the game locked up and CTD. Arghh!!! After a week of game play . Tried reloading the last save and playing it same thing happened.

Deleted patrol 25 and started again with a type VIIC, didn’t use Commander, only had one game save crash and that opened up on the second attempt. I did notice the MFM ships had reverted to shipping line skins (game now in 1942 and merchants before were now all grey) but I took that as because I was not using Commander. Another week of game time in patrol 25 and when exiting and returning to base it CTDs again. Is there any hope of saving this career? Or is it I suspect a complete reinstall, as I asked before, Any Ideas?