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Lost ArcMap Add-In Toolbar Associated with AssemblyCache Folder and ArcGIS Cache Manager

Question asked by dnemecek_IDWR on Jul 22, 2020

Our organization manages an ArcMap 10.6.1 add-in written using the ArcObjects SDK for .NET Framework 4.7.2. We publish the add-in file to a server folder. We edited the registry to make ArcMap look for the add-in in the server folder.


REG ADD HKLM\Software\WOW6432Node\ESRI\Desktop10.6\Settings\AddInFolders /v "server"


The problem is that a handful, but not most, user machines lose the toolbar in ArcMap every time we publish an updated add-in to the server folder, and the user has to either reboot their machine or ctrl-alt-delete and find the ArcGIS Cache Manager and end that task to regain the toolbar (see attached).


I have read extensively about this problem:

  1. Old add-ins cached in ArcGIS 10.2, preventing updates 
  2. Problem: Changes are not made to updated versions of an add-in installed in ArcMap 
  3. arcgis desktop - ArcMap Add-In Not Updating To Latest Version - Geographic Information Systems Stack Exchange 
  4. ArcMap addin Path


Interestingly, I see mixed results among users with their AssemblyCache folders (C:\Users\UserName\AppData\Local\ESRI\Desktop10.x\AssemblyCache). The add-in is associated with a GUID, and the folder name for the add-in in the AssemblyCache folder is that GUID. One user's AssemblyCache\{GUID} folder updates to contain the latest dlls, and another user's folder is sometimes empty, and sometimes has the dlls in it, before or after an update to the add-in.


I would like more information about this problem. Even better, I would like to know if there is an ESRI or Windows setting that can be changed to address this problem, or if that is not an option, is there a way to automate ending the ArcGIS Cache Manager task using ArcObjects inside the source code for our add-in?