How To Fix /SAPAPO/PDEM859 - Schedule number for line &1 is not entered in the Excel file

/SAPAPO/PDEM859 - Overview

• Message type: E = Error

• Message class: /SAPAPO/PDEM -

• Message number: 859

• Message text: Schedule number for line &1 is not entered in the Excel file

Self-Explanatory Message

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/SAPAPO/PDEM859 - Details

• The SAP error message /SAPAPO/PDEM859 Schedule number for line &1 is not entered in the Excel file typically occurs in the context of SAP Advanced Planning and Optimization (APO) when trying to upload or process data from an Excel file. This error indicates that a required schedule number for a specific line item (denoted by &1) is missing in the Excel file being processed.
  
  Cause:
  
  Missing Data: The most common cause of this error is that the Excel file does not contain a schedule number for the specified line item. This could be due to an oversight during data entry or preparation of the Excel file.
  Incorrect Formatting: The schedule number might be present but formatted incorrectly (e.g., as text instead of a number).
  File Corruption: The Excel file might be corrupted or not properly structured, leading to issues in reading the data.
  Mapping Issues: There could be a mismatch between the expected data structure