Report Writer, Reports: 'Cannot open file C:\Users\....\AppData\Local\Temp\.. The process cannot access the file because it is being used by another process’ report running, printing error

Consider the following advice to resolve the above error:

A. Delete Registry Editor Key 

Delete the local agent’s Registry Editor Key folder on the local PC.

If working in a RDP environment, find the relevant agent folder in the Registry Editor, and do the same.

Open this link for a detailed article on how to delete the agent's Registry Editor Key. 

Request assistance of your local IT technician to do the following:

Add Full Control (full Read and Write) permissions for the relevant user mentioned in the above error (e.g., Garth (in this case), on the Security tab of the Users folder's Properties screen.