Hi! I have two problems with my mod, let me explain. 1.Missing worldspaces, items I built my -quite large- mod, called Abaye-Angawey for a few months, but I encountered some problems in CS. As the data growing, CS became more and more unstable, there were frequent crashes, and strange phantom-edits (a few trees appeared, objects gone/moved, etc). i installed the latest CS Extender, which is a brilliant stuff, but there are still random CTDs, especially when I working on places containing a lot of objects, like trees, rocks, and so on. As I learned (probably well), solution can be to convert the plugin to esm, then continue the work to an additional esp, which containing the additional changes, of course. It worked like a charm, no crashes, fast, and so on... Well, I tried to save the current state as an esm (OR previously converted with Gecko - does not matter, both ways have the same effect). I loaded up the esm in the game. Everything which is affected by the mod, was gone entirely or partially. Player falls down, like items, enemies. Many objects are gone. Only a few (static only) objects remained in place. When I change back to the esp, everything is okay. What I did wrong, or misunderstand? 2. Reference Naming. When I started the project, I did a lethal mistake: It is built upon an existing mod. First, it was a pure practicing piece, not intended to further development, even for release. But it growed from time to time, and there is a complete, detailed world, or realm, when I realized this thing. Major problem is the main interior cell, which bears the original name (from that another mod). I have many references, scripts, which calls the interior's name, reneming would be a total disaster, I think. There is any solution for this? I rebuilt the whole thing with new name. Thanks.