How To Fix ED155 - Phase has already been modified at beginning or end

ED155 - Overview

• Message type: E = Error

• Message class: ED - ABAP/4 Editor messages

• Message number: 155

• Message text: Phase has already been modified at beginning or end

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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ED155 - Details

• The SAP error message ED155, which states "Phase has already been modified at beginning or end," typically occurs in the context of data processing or data transfer, particularly when dealing with IDocs (Intermediate Documents) or other data transfer mechanisms in SAP.
  
  Cause:
  This error usually arises when there is an attempt to modify a phase (or segment) of an IDoc or data structure that has already been altered. This can happen due to:
  
  Concurrent Modifications: If multiple processes or transactions are trying to modify the same IDoc or data segment simultaneously.
  Incorrect Processing Logic: If the logic in the program or function module is attempting to change the same phase more than once without proper checks.
  Data Integrity Issues: If the data being processed has already been flagged for modification, and another process tries to modify it again.
  
  
  Solution:
  To resolve the ED155 error, consider the following steps:
  
  
  Check for Concurrent Processes: Ensure that no other processes are