Hi,
The issues here is, due to the missing custom workflow file CRM is unable to build the Workflow assembly. Suggest you set "MSBuild project build output verbosity'' and "MSBuild project build log file verbosity" to Diagnostics to see
details about each artefact that is being built and deployed.
You can do this from your visual studio tools menu
Visual Studio -> tools -> Projects and Solutions -> Build and Run and set the above two options to Diagnostics.
Please follow the steps below and verify for your custom workflow activity
1. Your Solution, Open CrmPackage .proj file to check any references to Workflow Project file and remove it.
2. Update RegisterFile.crmregister config file and comment out the <workflowtype> that you don't want to deploy.
3. Deactivate any workflow that uses your custom workflow activity.
3. You should use plugin registration tool (can be found in CRM SDK tools) and manually un-register the workflow assembly. Now that you have already deployed the assembly you will encounter deployment issues like type not found for missing any missing custom
activities. (only do this on your dev not suggested for any other environments). Suggest you take a backup.
4. Once the custom workflow is unregistered your Workflow that used the custom WF activity will not open.
Hope this helps
Hope this helps. Amar
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