Class type & : class & not yet completely saved

What causes this issue?

You called class maintenance from a classification function in order to
create a class. You saved the class and are now back in the
classification function. However, the class is still being saved.

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?

Try again later.

Error message extract from SAP system. Copyright SAP SE.