Message type: E = Error
Message class:  RSDODSO - Messages for ODS Objects 
Message number: 409
Message text: Selection criteria: Character "&1" is not valid
The table with the selection criteria contains the character &V1& that
does not belong to the valid values listed below.
An error message is displayed, and the control data is given for the
program that was called.
Make sure that the character (field SIGN) is among the following
values:
'E'  = exclude
'I' = include
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 RSDODSO409, which states "Selection criteria: Character '&1' is not valid," typically occurs in the context of data extraction or reporting when the system encounters an invalid character in the selection criteria for a DataStore Object (DSO) or InfoProvider.
Cause: Invalid Characters: The error is often caused by the presence of invalid characters in the selection criteria. This can include special characters, spaces, or characters that are not allowed in the context of the field being queried. Data Type Mismatch: The selection criteria may not match the expected data type of the field. For example, trying to filter a numeric field with a string value. Incorrect Field Name: The field name specified in the selection criteria may be incorrect or not exist in the DSO or InfoProvider.
Configuration Issues: There may be issues with the configuration of the DSO or the way the data is modeled in the system.
Solution: Check Selection Criteria: Review
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