Upgrade still running: Logon not possible
Message type: E = Error
Message class: TR - Change and Transport System
Message number: 900
Message text: Upgrade still running: Logon not possible
What causes this issue?
The system is locked for an upgrade.
System Response
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
How to fix this error?
Log on again later.
Error message extract from SAP system. Copyright SAP SE.
