How To Fix SALV_EXCEPTION020 - Main node could not be set

SALV_EXCEPTION020 - Overview

• Message type: E = Error

• Message class: SALV_EXCEPTION - Exception Messages

• Message number: 020

• Message text: Main node could not be set

Self-Explanatory Message

Since SAP believes that this specific error message is 'self-explanatory,' no more information has been given.The majority of messages in the SAP system have a message text, however this is frequently insufficient to comprehend or resolve the problem.

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.

Unfortunately, there isn't any extra information in this error notice.

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Smart SAP Assistant

• What is the cause and solution for SAP error message SALV_EXCEPTION020 - Main node could not be set ?

  The SAP error message SALV_EXCEPTION020 typically indicates that there is an issue with the ALV (ABAP List Viewer) grid when trying to set the main node in a hierarchical display. This error can occur in various scenarios, often related to the configuration or data being processed.
  Causes:
  
  Data Structure Issues: The data being passed to the ALV might not be structured correctly. For example, if the hierarchy levels are not properly defined or if there are inconsistencies in the data.
  Incorrect Node Configuration: The main node might not be set correctly in the ALV configuration, leading to this error.
  Empty or Null Values: If the data set contains empty or null values where a node is expected, it can cause this error.
  Incompatible Data Types: The data types of the fields being used in the ALV might not match the expected types, leading to issues when trying to display them.
  
  Solutions:
  
  Check Data Structure: Ensure that the