Mmh... I was already aware of those "rules", but i thought i should have been a little more precise in following the STEP guide. Merging only when told and whatnot. Thank you nonetheless Regard your REAL first step, i have no missing master. Already been really thorough with checking. in regard to SKSE, i installed it following the rule on this link --> https://wiki.step-project.com/Skyrim_Script_Extender#Recommendations (i hadn't ever installed it like this, always used to just paste everything in skse.7z in skyrim folder) --------------------------------------------------------------- i have just used Memory Blocks Log, and all block say 85. no more, no less. a whole lot under the 256 basic heapspace. I think i'll reinstall skyrim because Wrye Bash says that there is a missing string localization line from Update.esm The localization line is 'Update_ITALIAN.DLSTRINGS' . Probably a leftover error from first download (was in italian). When i noticed it, i changed language on Steam settings. Thank you for helping me. I'm gonna delete all mods and STEP customization, delete skyrim, reinstall it directly in English, and restart the STEP. EDIT: And then, probably, i'll return here with many new problems ahah