Hello, We have a customer who came with the error on his historian "Service not registered; InSQLIndexing;5; Access is denied" From one of the past cases this error was resolved by running the aahSecurity.exe, he ran it and it resolved that error in historian but he got the PCS error "Unable to determine the Default PCS Solution from the configuration. For more information, see the **Repairing or Re-installing Platform Common Services” section of the AVEVA Common Services Portal User Guide**, he followed the TN10500 to resolve the PCS error, but the historian error came back again. This is Aveva Historian 2020 R2. Does anyone know what is the cause of this?