How To Fix SFGDT_TOOL023 - The external number consists of 20 characters and starts with "TT"

SAP Error Message - Details

• Message type: E = Error

• Message class: SFGDT_TOOL -

• Message number: 023

• Message text: The external number consists of 20 characters and starts with "TT"

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 SFGDT_TOOL023 - The external number consists of 20 characters and starts with "TT" ?

  The SAP error message SFGDT_TOOL023 indicates that there is an issue with the external number format in the context of the SAP system, specifically related to the use of external identifiers that are expected to follow certain rules.
  Cause:
  The error message suggests that the external number you are trying to use:
  
  Consists of 20 characters.
  Starts with the prefix "TT".
  
  In many SAP configurations, there are specific rules regarding the format and length of external numbers. The prefix "TT" may be reserved for specific purposes or may not be allowed in certain contexts, leading to this error.
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check the External Number Format: Ensure that the external number you are trying to use adheres to the expected format. If it is supposed to be a different prefix or a different length, modify it accordingly.
  
  
  Review Configuration Settings: If you have access to the configuration settings in SAP, check the settings related to external number ranges. There may be restrictions or specific formats defined that you need to follow.
  
  
  Consult Documentation: Refer to the SAP documentation or help resources related to the specific module you are working with. This can provide insights into the expected formats and any restrictions.
  
  
  Contact SAP Support: If you are unable to resolve the issue through the above steps, consider reaching out to SAP support or your internal SAP support team for assistance. They may have more specific insights into the error and how to resolve it.
  
  
  Testing: After making changes, test the process again to ensure that the error does not reoccur.
  
  
  Related Information:
  
  SAP Notes: Check for any relevant SAP Notes that might address this specific error or provide additional context.
  Transaction Codes: If applicable, look into transaction codes related to the module you are working with to see if there are any specific settings or configurations that need to be adjusted.
  User Forums: Consider visiting SAP community forums or user groups where similar issues may have been discussed, and solutions shared.
  
  By following these steps, you should be able to identify the cause of the error and implement a solution to resolve it.