Hey ive been merging a bit with TES5edit, Ive been getting this error on a few of my attempts;

Preparing merged file...
Script is using Daedric Brothers' Compilation Pack.esp as the merge file.
[Daedric Brothers' Compilation Pack.esp] Adding master "HjakhtraevarrTomb.esp"
[Daedric Brothers' Compilation Pack.esp] Adding master "HraghenskaagLabyrinths.esp"
[Daedric Brothers' Compilation Pack.esp] Adding master "mannyBlackRock.esm"
[Daedric Brothers' Compilation Pack.esp] Adding master "mannyDragonhead.esm"
[Daedric Brothers' Compilation Pack.esp] Adding master "Skyrim.esm"
Error copying file scripts\source\qf_dragonheadquest_0100d259.psc: The process cannot access the file because it is being used by another process
Error copying file scripts\source\enabledisablelinkrefequipped.psc: The process cannot access the file because it is being used by another process
Error copying file scripts\source\murder_actorenableondeath.psc: The process cannot access the file because it is being used by another process
Error copying file scripts\source\murder_hl_dragonondeath.psc: The process cannot access the file because it is being used by another process
[Apply Script done] Processed Records: 0, Elapsed Time: 00:46

NNM is closed, Skyrim is closed, ive tried this with some other quest/dungeons mods and it usually is a "psc" file, doesn this mean some other program is actually using this? or is this a script that just cant be merged. Thanks!!

Was the ck closed?

yes. I rarely use CK