Message type: E = Error
Message class:  AQV - Message texts for SAP Query 
Message number: 606
Message text: Field & is used in queries
You tried to remove a field that is still used in queries from the
functional area.
The system issues an error message and will not allow you to continue with this transaction until the error is resolved.
Before removing a field from the functional area, you must make sure
that this field is no longer used in any query. With the directory
functions you can display all the queries that use this field. Change
these queries so that the field is no longer used or delete the
queries. You can then remove the field from the functional area.
Error message extract from SAP system. Copyright SAP SE.
The SAP error message AQV606 typically indicates that a field is being used in queries but is not properly defined or is not available in the context where it is being referenced. This can occur in various scenarios, such as when working with queries in SAP Query, InfoSets, or when using certain fields in reports.
Cause: Field Not Defined: The field referenced in the query may not be defined in the underlying data structure or InfoSet. Field Not Available: The field may not be available in the context of the query being executed, possibly due to selection criteria or data source limitations. Field Deletion or Changes: The field may have been deleted or modified in the database or data model, leading to inconsistencies. Authorization Issues: The user may not have the necessary authorizations to access the field in question.
Solution: Check Field Definition: Verify that the field is correctly defined in the underlying table or InfoSet. Ensure
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