How To Fix U7020 - Internal reading error field string &1 in &2 &3

SAP Error Message - Details

• Message type: E = Error

• Message class: U7 - Japan-Specific Developments

• Message number: 020

• Message text: Internal reading error field string &1 in &2 &3

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 U7020 - Internal reading error field string &1 in &2 &3 ?

  The SAP error message U7020, which states "Internal reading error field string &1 in &2 &3," typically indicates that there is an issue with reading data from the database or a problem with the data structure in the specified table or field. This error can occur in various contexts, such as during data retrieval, updates, or processing.
  Causes:
  
  Data Corruption: The data in the specified field or table may be corrupted or inconsistent.
  Database Issues: There may be issues with the database itself, such as locks, inconsistencies, or corruption.
  Field Definition Changes: Changes in the field definitions (like data type changes) that are not properly reflected in the database can lead to this error.
  Authorization Issues: Lack of proper authorizations to access the specified field or table can also trigger this error.
  Program Logic Errors: Bugs in the ABAP code or program logic that lead to incorrect data handling.
  
  Solutions:
  
  Check Data Integrity: Verify the integrity of the data in the specified field and table. You can use transaction codes like SE11 (Data Dictionary) to check the structure and data.
  Database Consistency Check: Run database consistency checks to identify and fix any corruption or inconsistencies. This may involve using transaction codes like DB02 or DBACOCKPIT.
  Review Changes: If there have been recent changes to the data model (like field definitions), ensure that all related objects are updated accordingly.
  Authorization Check: Ensure that the user has the necessary authorizations to access the specified field and table.
  Debugging: If you have access to the ABAP code, use the debugger to trace the execution and identify where the error occurs. Look for any logical errors in the code.
  SAP Notes: Check the SAP Support Portal for any relevant SAP Notes that may address this specific error. There may be patches or updates available that resolve the issue.
  
  Related Information:
  
  Transaction Codes: SE11 (Data Dictionary), SE80 (Object Navigator), SE37 (Function Module), and ST22 (Dump Analysis) can be useful for diagnosing issues.
  SAP Support: If the issue persists, consider reaching out to SAP Support with detailed information about the error, including the context in which it occurs, the specific field and table names, and any relevant logs or dumps.
  Community Forums: SAP Community and other forums can be helpful for finding similar issues faced by other users and potential solutions.
  
  By following these steps, you should be able to diagnose and resolve the U7020 error in your SAP system.