ArcMAP error in logwrite 91: Object variable or With block variable not set

[MattValencia]

I have an issue launching ArcMap.exe and loading .mxd

I am prompted with an error on launch and exit of ArcMAP

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Error in LogWrite:

         91: Object variable or With block variable not set

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I am using ArcGIS ArcMAP 10.3.1 on Windows 10 ver 1803

suspect is installation of autocad related software, possible dll issues?

What I have tried:

ArcGIS 10.3.1 Repair

ArcGIS 10.3.1 uninstall / directory cleanup + registry cleanup / reboot / re-install

creating new windows 10 profile

Anyone have any information, ideas / suggestions would be very helpful.

[MichaelVolz]

Did you have an earlier version of ArcMap installed on this machine?

[MattValencia]

Hello Michael

No I do not have an earlier version of Arcmap installed

Just an install of ArcGIS Desktop 10.3.1

ArcGIS_Desktop_1031_145699.exe

C:\Program Files (x86)\ArcGIS\Desktop10.3

[MichaelVolz]

Can you uninstall the AutoCAD related software from the machine, at least temporarily to see if that gets rid of the error?

Can you also try the same install on a different computer?

[MattValencia]

Hello Michael

All AutoCAD related software removed / uninstalled

Same exact error!

Error on load of ArcGIS ArcMAP 10.3.1

Error in LogWrite:

   91: Object variable or With block variable not set

Error after exiting of ArcGIS ArcMAP 10.3.1

Error in LogWrite:

   91: Object variable or With block variable not set

[MichaelVolz]

Can you try option B to install ArcMap 10.3.1 on another computer that has never had AutoCAD software installed on it?

Do you not have the ability to use a newer version of ArcMap (it's at 10.7.1) or even Pro?

[MattValencia]

Can you try option B to install ArcMap 10.3.1 on another computer that has never had AutoCAD software installed on it?

 I have AutoCAD and ArcMap 10.3.1 installed on my machine, and there are many others here as well that have autoCAD 2020

Do you not have the ability to use a newer version of ArcMap (it's at 10.7.1) or even Pro?

NO

I have uninstalled ArcMAP 10.3.1

uninstalled all autoCAD programs

rebooted and re-installed ARcMAP 10.3.1 on machine

Same Error

[MichaelVolz]

So you already have computers setup at your org that have ArcMap 10.3.1 and AutoCAD 2020 working together?  I don't use AutoCAD but I did not think a new version of AutoCAD such as 2020 would be compatible with that old a version of ArcMap.  Does ESRI or AutoCAD have a compatibility matrix to show that this setup is supported?

[MattValencia]

I have a computer here that has just ArcMap 10.3.1

when i start ArcMAP 10.3.1 i get an error

Error in LogWrite:

   91: Object variable or With block variable not set

Maybe there is a component i am missing, library?