How To Fix RSWADMDERR1399 - Mandatory List parameter '&2' needs at least one child (ancestor: &1).

SAP Error Message - Details

• Message type: E = Error

• Message class: RSWADMDERR1 - Web Application Designer 4.0 Error Messages

• Message number: 399

• Message text: Mandatory List parameter '&2' needs at least one child (ancestor: &1).

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message RSWADMDERR1399 - Mandatory List parameter '&2' needs at least one child (ancestor: &1). ?

  The SAP error message RSWADMDERR1399 indicates that a mandatory list parameter in a report or program requires at least one child (or sub-item) under a specified ancestor. This typically occurs in the context of data selection or reporting where hierarchical data structures are involved.
  Cause:
  
  Missing Child Elements: The specified ancestor (parameter &1) does not have any associated child elements (parameter &2). This could happen if the data structure is not properly populated or if there are no valid entries in the database for the specified ancestor.
  Incorrect Configuration: The configuration of the report or the data model may not be set up correctly, leading to the absence of expected child elements.
  Data Integrity Issues: There may be issues with the data integrity in the underlying database, such as missing relationships or incorrect data entries.
  
  Solution:
  
  Check Data Hierarchy: Verify the data hierarchy to ensure that the ancestor has the necessary child elements. You can do this by checking the relevant tables or data structures in the SAP system.
  Data Entry: If the child elements are missing, you may need to enter the required data into the system. This could involve creating new entries or correcting existing ones.
  Configuration Review: Review the configuration settings for the report or program to ensure that it is set up correctly to recognize and utilize the child elements.
  Debugging: If you have access to debugging tools, you can trace the execution of the report or program to identify where the error is occurring and why the child elements are not being recognized.
  Consult Documentation: Refer to the SAP documentation or help resources for the specific report or program to understand the expected data structure and requirements.
  
  Related Information:
  
  Transaction Codes: Depending on the context, you may want to check transaction codes related to the report or data model you are working with (e.g., SE80 for Object Navigator, SE11 for Data Dictionary).
  SAP Notes: Search for relevant SAP Notes that may address this specific error or provide additional guidance on similar issues.
  Community Forums: Consider checking SAP Community forums or other user groups for similar issues and solutions shared by other users.
  
  If the problem persists after trying the above solutions, it may be beneficial to reach out to your SAP support team or consult with an SAP expert for further assistance.