How To Fix R8155 - Primary segment &1; invalid internal data type '&2' (use type 'u')

R8155 - Overview

• Message type: E = Error

• Message class: R8 - Messages from the meta data generation

• Message number: 155

• Message text: Primary segment &1; invalid internal data type '&2' (use type 'u')

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 R8155 - Primary segment &1; invalid internal data type '&2' (use type 'u') ?

  The SAP error message R8155 indicates that there is an issue with the internal data type of a primary segment in a data structure or database table. Specifically, it suggests that the internal data type being used is invalid and that the system expects a type of 'u' (which typically refers to an unsigned integer).
  
  Cause:
  
  Invalid Data Type: The primary segment is defined with an incorrect or unsupported data type. This can happen if the data type is not compatible with the expected format or if there is a mismatch in the data definitions.
  Data Model Changes: If there have been recent changes to the data model or database schema, it may lead to inconsistencies in the data types being used.
  Custom Development: If there are custom programs or enhancements that manipulate data structures, they may inadvertently use incorrect data types.
  
  
  Solution:
  
  Check Data Type Definitions: Review the data type definitions for the primary segment