[FIXED] Hello all, Im really starting to feel like an idiot. Working on an interior cell from scratch, and the first session goes fine. I return, add more (at the moment its just objects, Im a beginner and havent gotten any farther.) On my second session Im getting problems. When I try to save it, it says an error, "this file is either a master or is currently in use." I cant close the file bc its not saved. The very first attempt I made I saved it under a different name only to find the second save didnt include what I had built the first time. My only guess is the 177mb "limit" listed a the top, which Ive noticed is exceeded by large amounts in many vanilla cells, and that (I believe) it wanted me to save it as something called a TES file, cant even find that in a search. Both instances the only consistency is this limit being exceeded on the second session. the second cell attempt, after trying to press the save icon rather than file-save, said the same, but after that I couldnt even save it as something else--- after doing this, the error message is the only thing i get trying to save at all. Lost a few hours of work, but more importantly, I cant find any info on this at all, though i feel someone has to have blundered into this same problem. What am I doing wrong? Im willing to take the plunge into learning as much as I can, but I cant even make progress with just placing objects, and unless theres something wrong with my ck install, its disheartening to learn that even the process of saving just cant be like autoCAD, Adobe, Rhino, and all the other progams Ive learned as well as just about every other program in existence since the 90s. If anyone can even point me in a direction to research, I would be grateful.