How To Fix OE020 - Purchase order no or item no is missing in E1OILT1

OE020 - Overview

• Message type: E = Error

• Message class: OE - IS-Oil: ITA/TPI messages

• Message number: 020

• Message text: Purchase order no or item no is missing in E1OILT1

Self-Explanatory Message

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OE020 - Details

• The SAP error message OE020, which states "Purchase order no or item no is missing in E1OILT1," typically occurs during the processing of an IDoc (Intermediate Document) related to the purchase order. This error indicates that the required fields for the purchase order number or item number are not populated in the IDoc segment E1OILT1, which is used for conveying item-level details of a purchase order.
  
  Cause:
  
  
  Missing Data: The most common cause of this error is that the purchase order number or item number is not being sent in the IDoc. This could be due to:
  
  Incorrect mapping of fields in the IDoc.
  Data not being populated in the source system before sending the IDoc.
  Issues in the data extraction process from the source system.
  
  
  
  
  Configuration Issues: There may be configuration issues in the IDoc processing settings that prevent the correct data from being included.
  
  
  Custom Development: If there are custom developments or enhancements in the