Message type: E = Error
Message class:  ISU_GS_IN_SMS - Message class for IS-U: India localization for SMS Services 
Message number: 022
Message text: Please enter either &1 or &2 or &3 or &4 or Installation or Billing Class
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The SAP error message ISU_GS_IN_SMS022 typically occurs in the context of the SAP IS-U (Utilities) module, particularly when dealing with the processing of service orders or billing documents. This error indicates that the system requires at least one of the specified fields to be filled in order to proceed with the operation.
Cause: The error message ISU_GS_IN_SMS022 is triggered when the user attempts to execute a function (like creating or processing a service order) without providing the necessary input in the required fields. The fields mentioned in the error message (represented as &1, &2, &3, &4) could refer to various identifiers or parameters that are essential for the operation, such as: &1: Installation Number &2: Billing Class &3: Service Order Number &4: Other relevant identifiers The system requires at least one of these fields to be populated to identify the relevant data for processing.
Solution: To resolve this error, you should: Check Required Fields: Ensure that you have filled in
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