Yeah, I've had the line 44 error with C4Pro, generally when trying to save a render. There's a work around for that particular error - the file will save if you over-write an existing file. But having had that one I expect to get others... it's grim. I love this software but sometimes it tries my patience. Also I can't quite get over the idea that Eovia rush things out. There are still no presets with the NPR, which seems pretty silly to me...