How To Fix IST_EBS123 - The external doc. no. &1 is too long to be used as an internal doc. no.

IST_EBS123 - Overview

• Message type: E = Error

• Message class: IST_EBS - Interface Between IS-T and External Billing System

• Message number: 123

• Message text: The external doc. no. &1 is too long to be used as an internal doc. no.

What causes this issue?

The length of transferred document numbers is restricted for external
number assignment.

System Response

The system cannot adopt the external document number that was
transferred as the number of a contract accounting document.

How to fix this error?

Note the length restriction for the following data element:
<DS:DE.OPBEL_KK>Contract account document number</>.
Alternatively, you can set internal number assignment in Customizing
for the interface.

Procedure for System Administrators

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

Error message extract from SAP system. Copyright SAP SE.

IST_EBS123 - Details

• The SAP error message IST_EBS123 indicates that the external document number you are trying to use is too long to be processed as an internal document number. This typically occurs in the context of electronic bank statement processing or similar financial transactions where document numbers are involved.
  
  Cause:
  The error is caused by the external document number exceeding the maximum length allowed for internal document numbers in the SAP system. Each document number has a defined length, and if the external document number surpasses this limit, the system cannot process it correctly.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Document Number Length: Verify the maximum length allowed for internal document numbers in your SAP configuration. This can usually be found in the configuration settings for the relevant module (e.g., Financial Accounting).
  
  
  Shorten the External Document Number: If possible, modify the external document number to ensure it fits within the allowed length.