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I've received this 'bug' twice now, and seems to render the .map file corrupt.  the error occurs when you try to open a .map file in black radiant, and the error message will appear;


(In the taskbar of the window)Sanity check failure

(!s_mapIsLoading)

F:\SteamLibrary\steamapps\common\Call of Duty Black Ops III\bin\radiant_modtools.exe
..\..\src\effectscore\fx_glue_material.cpp:264

when i click 'ok' or 'cancel' it will crash radiant and return me to modtools.
Any help would be very much appreciated, thanks.

re-install everything, I had same issue. Re-installation fixed my problem, also having all visual studio c++ redistribution packages from 2008-2013 installed both x86 & x64

well, for me, the fix was to change the component of my pc that runs the mod tools. for some reason, it was set to run on the processor, and i had to manually change it to operate with my graghics unit

I have the same problem, can someone confirm a fix for me???

well, for me, the fix was to change the component of my pc that runs the mod tools. for some reason, it was set to run on the processor, and i had to manually change it to operate with my graghics unit

What CPU does your PC have? 

I am having the same problem, but I'n not sure if what is causing the problem is the same. 
I have a i5 4690K so if you have something similar or better in performance than this might help me.

Also, how did you manually change it to operate with the graphics card over the CPU?

I have the same error over and over. I had a fully created map and its now gone. And also if I edit some tutorial maps the error comes too. Any fix?

I can confirm that DELETING THE MOD TOOLS AND REINSTALLIGN THEM DOES NOT WORK.

Am reinstalling the modtools now, by the way, I learned the hard way that all of you should be making back-ups of your map daily. I will update this post with information on if it worked or not.

Over and out.

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Double Post Merge: October 12, 2016, 03:37:44 am

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This is rediculous, I spent all day reinstalling everything to make sure it worked, and radiant loads up on an unnamed.map file. I open my backed up map file and I get the same error! I NEED a confirmed fix, my zombie map is so far in progress and it's gotten to the point of no return. Please someone help me!!!!

Btw this Can't be a problem with my map because I can't even load up a test map or the giant.

The only solution that I use is the auto-save feature which you find under radiant folder

All visual studio c++ redistribution packages from 2008-2013 installed both x86 & x64 need to be installed.

ALL visual studio c++ redistribution packages from 2008-2013 installed both x86 & x64 NEED TO BE INSTALLED FOR THE ERROR TO GO AWAY

All visual studio c++ redistribution packages is installed, but the problem persists. 

Here is how I fixed it:

1) Backup your map_source & usermaps folders.

2) Delete Local Content through steam for both Black Ops 3 & Mod Tools.

3) Goto Steam > Settings > Downloads > Steam Library Folders

4) Create a new Directory of your choosing (Has to be a new Directory)

5) Install Black Ops 3 and Choose the new Directory.

6) Install Black Ops 3 Mod Tools and Choose the new Directory.

7) Download the DLC Assets.

8) Launch the Mod Tools Launcher and create a new ZM Map.

9) Drag your map_source & usermaps folder over into the Root Folder of k Ops 3 and Overwrite.

10) Open your map in radiant! :))

Reason of New Directory:
When you delete the local content, steam keeps all the Saves, Configs, Cache Files, Workshop Items, etc...