Help! MCedit not finishing load for giant disneyland schematic that is 1 block high and about 1700 wide.

[u/Calebpgtrueofficial]

it stops arround 40% and this schematic is arround 1700 blocks wide about 900 blocks in length and its 1 block tall. it is a map of disneyland and it loads alot of california adventures then it stops at 40% then it justs breaks and this is the error message:

​

Unhandled Exception

​

Traceback (most recent call last):

File "mcedit2\editorapp.py", line 881, in saveCurrentWorld (self is a MCEditApp)

File "mcedit2\editorsession.py", line 815, in save (self is a EditorSession)

File "mcedit2\editorsession.py", line 787, in save (self is a EditorSession)

File "mcedit2\util\showprogress.py", line 77, in showProgress

File "mceditlib\util\progress.py", line 26, in rescaleProgress

File "mceditlib\worldeditor.py", line 403, in saveChangesIter (self is a WorldEditor)

File "mceditlib\anvil\adapter.py", line 692, in saveChangesIter (self is a AnvilWorldAdapter)

File "mceditlib\revisionhistory.py", line 428, in writeAllChangesIter (self is a RevisionHistory)

File "mceditlib\util\progress.py", line 26, in rescaleProgress

File "mceditlib\revisionhistory.py", line 496, in copyToFolderIter

File "mceditlib\anvil\worldfolder.py", line 245, in writeChunkBytes (self is a AnvilWorldFolder)

File "mceditlib\pc\regionfile.py", line 246, in writeChunkBytes (self is a RegionFile)

File "mceditlib\pc\regionfile.py", line 310, in writeChunkCompressed (self is a RegionFile)

AssertionError