This used to compile for months and months, and now it aborts with Error writing file derelict-assimp3-1.3.0

[WhatMeWorry]

I don't know the first step about how to trouble shoot this?  I 
haven't changed anything with my configuration.


Using dub registry url 'http://code.dlang.org/'
Refreshing local packages (refresh existing: true)...
Looking for local package map at 
C:\ProgramData\dub\packages\local-packages.json
Looking for local package map at 
C:\Users\kheaser\AppData\Roaming\dub\packages\local-packages.json
Note: Failed to determine version of package 00_01_print_ogl_ver 
at .. Assuming ~master.
Refreshing local packages (refresh existing: false)...
Looking for local package map at 
C:\ProgramData\dub\packages\local-packages.json
Looking for local package map at 
C:\Users\kheaser\AppData\Roaming\dub\packages\local-packages.json
   Found dependency derelict-util 2.0.6
   Found dependency derelict-ft 1.1.3
   Found dependency derelict-gl3 1.0.23
   Found dependency derelict-assimp3 1.3.0
   Found dependency derelict-al 1.0.3
   Found dependency derelict-fmod 2.0.4
   Found dependency derelict-fi 2.0.3
   Found dependency derelict-glfw3 3.1.3
Refreshing local packages (refresh existing: false)...
Looking for local package map at 
C:\ProgramData\dub\packages\local-packages.json
Looking for local package map at 
C:\Users\kheaser\AppData\Roaming\dub\packages\local-packages.json
   Found dependency derelict-util 2.0.6
   Found dependency derelict-ft 1.1.3
   Found dependency derelict-gl3 1.0.23
   Found dependency derelict-assimp3 1.3.0
   Found dependency derelict-al 1.0.3
   Found dependency derelict-fmod 2.0.4
   Found dependency derelict-fi 2.0.3
   Found dependency derelict-glfw3 3.1.3
Checking for upgrades.
Using cached upgrade results...
Generating using build
Generate target 00_01_print_ogl_ver (executable 
C:\Users\kheaser\OneDrive for 
Business\GitHub\Delivery\apps\00_01_print_ogl_ver\bin 
00_01_print_ogl_ver)
Generate target derelict-al (staticLibrary 
C:\Users\kheaser\AppData\Roaming\dub\packages\derelict-al-1.0.3\derelict-al\lib DerelictAL)
Generate target derelict-util (staticLibrary 
C:\Users\kheaser\AppData\Roaming\dub\packages\derelict-util-2.0.6\derelict-util\lib DerelictUtil)
Generate target derelict-assimp3 (staticLibrary 
C:\Users\kheaser\AppData\Roaming\dub\packages\derelict-assimp3-1.3.0\derelict-assimp3\lib DerelictASSIMP3)
Generate target derelict-fi (staticLibrary 
C:\Users\kheaser\AppData\Roaming\dub\packages\derelict-fi-2.0.3\derelict-fi\lib DerelictFI)
Generate target derelict-fmod (staticLibrary 
C:\Users\kheaser\AppData\Roaming\dub\packages\derelict-fmod-2.0.4\derelict-fmod\lib DerelictFmod)
Generate target derelict-ft (staticLibrary 
C:\Users\kheaser\AppData\Roaming\dub\packages\derelict-ft-1.1.3\derelict-ft\lib DerelictFT)
Generate target derelict-gl3 (staticLibrary 
C:\Users\kheaser\AppData\Roaming\dub\packages\derelict-gl3-1.0.23\derelict-gl3\lib DerelictGL3)
Generate target derelict-glfw3 (staticLibrary 
C:\Users\kheaser\AppData\Roaming\dub\packages\derelict-glfw3-3.1.3\derelict-glfw3\lib DerelictGLFW3)
Performing "$DFLAGS" build using dmd for x86_64.
derelict-util 2.0.6: building configuration "library"...
dmd -m64 -I..\ -I..\common -I..\common_game -lib 
-of..\..\..\..\..\AppData\Roaming\dub\packages\derelict-util-2.0.6\derelict-util\.dub\build\library-$DFLAGS-windows-x86_64-dmd_2075-288F079949563AF9CBE4EBDE748B5094\DerelictUtil.lib -w -version=Have_derelict_util -I..\..\..\..\..\AppData\Roaming\dub\packages\derelict-util-2.0.6\derelict-util\source ..\..\..\..\..\AppData\Roaming\dub\packages\derelict-util-2.0.6\derelict-util\source\derelict\util\exception.d ..\..\..\..\..\AppData\Roaming\dub\packages\derelict-util-2.0.6\derelict-util\source\derelict\util\loader.d ..\..\..\..\..\AppData\Roaming\dub\packages\derelict-util-2.0.6\derelict-util\source\derelict\util\sharedlib.d ..\..\..\..\..\AppData\Roaming\dub\packages\derelict-util-2.0.6\derelict-util\source\derelict\util\system.d ..\..\..\..\..\AppData\Roaming\dub\packages\derelict-util-2.0.6\derelict-util\source\derelict\util\wintypes.d ..\..\..\..\..\AppData\Roaming\dub\packages\derelict-util-2.0.6\derelict-util\source\derelict\util\xtypes.d -vcolumns
Copying target from 
C:\Users\kheaser\AppData\Roaming\dub\packages\derelict-util-2.0.6\derelict-util\.dub\build\library-$DFLAGS-windows-x86_64-dmd_2075-288F079949563AF9CBE4EBDE748B5094\DerelictUtil.lib to C:\Users\kheaser\AppData\Roaming\dub\packages\derelict-util-2.0.6\derelict-util\lib
derelict-al 1.0.3: building configuration "library"...
dmd -m64 -I..\ -I..\common -I..\common_game -lib 
-of..\..\..\..\..\AppData\Roaming\dub\packages\derelict-al-1.0.3\derelict-al\.dub\build\library-$DFLAGS-windows-x86_64-dmd_2075-21F315EBD8043B901FD8CBBDEC82056F\DerelictAL.lib -w -version=Have_derelict_al -version=Have_derelict_util -I..\..\..\..\..\AppData\Roaming\dub\packages\derelict-al-1.0.3\derelict-al\source -I..\..\..\..\..\AppData\Roaming\dub\packages\derelict-util-2.0.6\derelict-util\source ..\..\..\..\..\AppData\Roaming\dub\packages\derelict-al-1.0.3\derelict-al\source\derelict\openal\al.d -vcolumns
Copying target from 
C:\Users\kheaser\AppData\Roaming\dub\packages\derelict-al-1.0.3\derelict-al\.dub\build\library-$DFLAGS-windows-x86_64-dmd_2075-21F315EBD8043B901FD8CBBDEC82056F\DerelictAL.lib to C:\Users\kheaser\AppData\Roaming\dub\packages\derelict-al-1.0.3\derelict-al\lib
derelict-assimp3 1.3.0: building configuration "library"...
dmd -m64 -I..\ -I..\common -I..\common_game -lib 
-of..\..\..\..\..\AppData\Roaming\dub\packages\derelict-assimp3-1.3.0\derelict-assimp3\.dub\build\library-$DFLAGS-windows-x86_64-dmd_2075-66136B797AE4E1CD5A3A65B5758E8AC4\DerelictASSIMP3.lib -w -version=Have_derelict_assimp3 -version=Have_derelict_util -I..\..\..\..\..\AppData\Roaming\dub\packages\derelict-assimp3-1.3.0\derelict-assimp3\source -I..\..\..\..\..\AppData\Roaming\dub\packages\derelict-util-2.0.6\derelict-util\source ..\..\..\..\..\AppData\Roaming\dub\packages\derelict-assimp3-1.3.0\derelict-assimp3\source\derelict\assimp3\assimp.d ..\..\..\..\..\AppData\Roaming\dub\packages\derelict-assimp3-1.3.0\derelict-assimp3\source\derelict\assimp3\types.d -vcolumns
Error: Error writing file 
'..\..\..\..\..\AppData\Roaming\dub\packages\derelict-assimp3-1.3.0\derelict-assimp3\.dub\build\library-$DFLAGS-windows-x86_64-dmd_2075-66136B797AE4E1CD5A3A65B5758E8AC4\DerelictASSIMP3.lib'
FAIL 
..\..\..\..\..\AppData\Roaming\dub\packages\derelict-assimp3-1.3.0\derelict-assimp3\.dub\build\library-$DFLAGS-windows-x86_64-dmd_2075-66136B797AE4E1CD5A3A65B5758E8AC4\ DerelictASSIMP3 staticLibrary
dmd failed with exit code 1.
myapp exited with code 2