How To Fix RSM776 - Invalid InfoSource definition; no update mode can be selected

RSM776 - Overview

• Message type: E = Error

• Message class: RSM -

• Message number: 776

• Message text: Invalid InfoSource definition; no update mode can be selected

Self-Explanatory Message

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To make things easier, more detailed information is frequently added to describe the issue, how to fix it, and the necessary steps or configuration modifications.

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RSM776 - Details

• The SAP error message RSM776, "Invalid InfoSource definition; no update mode can be selected," typically occurs in the context of SAP BW (Business Warehouse) when there is an issue with the configuration of an InfoSource. This error indicates that the system cannot determine a valid update mode for the InfoSource due to its definition being incomplete or incorrect.
  Causes:
  
  Incomplete InfoSource Definition: The InfoSource may not be fully defined, missing key components such as data sources or transformation rules.
  Incorrect Update Mode: The update mode (e.g., 'Direct Update', 'Data Transfer Process', etc.) may not be properly set or may not correspond to the data source.
  Missing or Incorrect DataSource: The DataSource linked to the InfoSource may be missing or incorrectly configured.
  Inconsistent Data Model: There may be inconsistencies in the data model that prevent the InfoSource from being processed correctly.
  Transport Issues: If the InfoSource was transported from another system, there may be issues with the