Symptoms

Error Deploying K2 for SharePoint 
 

Diagnoses

Unable to deploy K2 for SharePoint - Core Components.wsp with the following error message:

Some of the files failed to copy during deployment of the solution.

That can happen when deployment process unable to add the specified assembly to the global assembly cache:

ISAPISourceCode.SharePoint.Workflow.dll.
Error: Cannot add the specified assembly to the global assembly cache: ISAPISourceCode.SharePoint.Workflow.dll.

Resolution

This problem can be caused by a Local Security Policy on the WFE Server blocking the Removal of Assemblies from the GAC . You can try to disable it and attemp Deployment and Configuration after this. To do this perform the following steps:

- Open Local Security Policy MMC
- Goto Security Settings -> Local Policies -> Security Options
- Locate “User Account Control: Run all administrators in Admin Approval” and change the setting from Enabled to Disabled

- Reboot and now the assemblies can be deleted