Symptoms: When trying to make any (standard) report from the Sentinel system, you get the error: “Error in File C:\WINDOWS\TEMP\SumPrinter{<ID>}.rpt: Access to file denied. Another program may be using it”.
Cause: Sentinel is using Crystal Reports to create its reports, and it requires access to the Windows temp folder to make temporary calculations before generating the reports. This error occurs when Crystal Reports does not have access to the Windows temporary folder (usually c:\windows\temp).
Resolution: Add write permission to the Windows Temp folder.