How To Fix /SAPAPO/SDP256 - The drilldown or drillup operation chosen is not valid

/SAPAPO/SDP256 - Overview

• Message type: E = Error

• Message class: /SAPAPO/SDP -

• Message number: 256

• Message text: The drilldown or drillup operation chosen is not valid

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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/SAPAPO/SDP256 - Details

• The SAP error message /SAPAPO/SDP256 indicates that there is an issue with the drilldown or drillup operation in the SAP Advanced Planning and Optimization (APO) module, specifically in the Supply Network Planning (SNP) or Demand Planning (DP) areas. This error typically occurs when the user attempts to perform a drilldown or drillup operation that is not valid based on the current context or data structure.
  Causes:
  
  Invalid Context: The drilldown or drillup operation may not be valid for the current selection or context. For example, if the user is trying to drill down on a characteristic that does not support such an operation.
  Missing Data: The data required for the drilldown or drillup operation may not be available or may not have been loaded correctly.
  Hierarchy Issues: If the user is trying to drill down or up in a hierarchy that is not properly defined or does not exist, this error can occur.
  Authorization Issues: