Internal error during full text search in KPro (&1)

What causes this issue?

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

System Response

How to fix this error?

Check the application log (transaction <DS:TRAN.SLG1>SLG1</>) for the
object 'SCMS' to obtain a more precise error analysis.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.