How To Fix T0520 - Transaction &1 &2 already allocated

T0520 - Overview

• Message type: E = Error

• Message class: T0 - General Treasury

• Message number: 520

• Message text: Transaction &1 &2 already allocated

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.

What else can you do?

First, use our AnswerBot below to get a possible cause and solution (requires a premium subscription).

Also, review the in-depth Common Questions & Answers listed below; you could discover a solution there or be able to connect with others who have faced similar challenges.

You can also try searching the SAP support portal (support.sap.com) but you need a special user ID to access it. It is possible that an SAP support note exists that provides additional details about the mistake or even steps for fixing it.

Smart SAP Assistant

• What is the cause and solution for SAP error message T0520 - Transaction &1 &2 already allocated ?

  The SAP error message T0520, which states "Transaction &1 &2 already allocated," typically occurs when there is an attempt to allocate a transaction that has already been assigned or processed in the system. This can happen in various contexts, such as during financial transactions, inventory management, or other processes where unique transaction identifiers are required.
  
  Cause:
  
  Duplicate Transaction: The most common cause is that the transaction you are trying to process has already been allocated or recorded in the system.
  Concurrency Issues: If multiple users or processes are trying to allocate the same transaction simultaneously, it can lead to this error.
  System Configuration: There may be configuration settings that prevent the reallocation of certain transactions.
  Data Integrity Issues: Corrupted or inconsistent data in the database can also lead to this error.
  
  
  Solution:
  
  Check Transaction Status: Verify the status of the transaction you are trying to allocate. If it has already been processed, you may need to look