Message type: E = Error
Message class:  RSO_RES_ADSO - Datastore Object 
Message number: 187
Message text: aDSO '&1' is a member of '&2': Ranges on field '&3' must not be changed
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The SAP error message RSO_RES_ADSO187 indicates that there is an issue with the handling of ranges on a specific field in an Advanced DataStore Object (aDSO). This error typically arises when you are trying to modify or change the ranges on a field that is part of a specific aDSO, which is not allowed in certain contexts.
Cause: The error occurs because: The aDSO is configured in such a way that the ranges on the specified field cannot be altered. This is often due to the aDSO's data model or the way it is being used in a query or data extraction process. The field in question is likely part of a key or a characteristic that has restrictions on how it can be manipulated within the context of the aDSO.
Solution: To resolve this error, you can consider the following steps: Check the aDSO Configuration: Review the configuration of the aDSO to understand the restrictions on
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