Message type: E = Error
Message class:  CNV_MBT_09_A - Message class for drop-solution 
Message number: 355
Message text: Determination of not active indexes successfully executed.
The determination of not used indexes was successfully processed. The
result is written into table cnvmbt09index in the receiver system.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message CNV_MBT_09_A355 indicates that the system has successfully executed the determination of inactive indexes during a data migration or conversion process. This message is typically part of the SAP Landscape Transformation (SLT) or SAP Data Migration processes, particularly when using the SAP S/4HANA Migration Cockpit or similar tools.
Cause: The message itself is not an error but rather an informational message indicating that the system has identified indexes that are not currently active. This can occur for several reasons: Indexes are not needed: The indexes may not be required for the current operation or data set. Data Migration: During data migration, certain indexes may be temporarily disabled to improve performance. Database Maintenance: Indexes may be inactive due to maintenance activities or optimizations performed on the database.
Solution: Since this message is informational, it does not require a direct solution. However, if you are concerned about the inactive indexes, you can take the following steps: Review
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