How To Fix DT172 - Field &: & is not a basis type for streams and locators

SAP Error Message - Details

• Message type: E = Error

• Message class: DT - Table activation (incl. indexes)

• Message number: 172

• Message text: Field &: & is not a basis type for streams and locators

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message DT172 - Field &: & is not a basis type for streams and locators ?

  The SAP error message DT172 indicates that there is an issue with the data type being used in a context where a stream or locator is expected. This typically occurs in the context of database operations, particularly when dealing with large objects (LOBs) such as BLOBs (Binary Large Objects) or CLOBs (Character Large Objects).
  Cause:
  The error message "Field &: & is not a basis type for streams and locators" usually arises due to one of the following reasons:
  
  
  Incorrect Data Type: The field being referenced is not of a type that can be used as a stream or locator. For example, if you are trying to use a standard data type (like CHAR or INT) instead of a LOB type (like BLOB or CLOB), this error will occur.
  
  
  Database Schema Issues: There may be a mismatch between the expected data types in the database schema and the types defined in your ABAP program or data model.
  
  
  Incompatible Operations: The operation you are trying to perform may not be compatible with the data type of the field. For example, trying to perform a stream operation on a non-stream-compatible type.
  
  
  Solution:
  To resolve the DT172 error, you can take the following steps:
  
  
  Check Data Types: Verify that the field in question is defined as a LOB type (BLOB or CLOB) in the database schema. If it is not, you may need to change the data type in your ABAP program or adjust the database schema accordingly.
  
  
  Modify ABAP Code: If you are using a field that is not a LOB type, modify your ABAP code to use the correct data type. Ensure that any operations you are performing on the field are compatible with its data type.
  
  
  Database Table Definition: If you are working with a custom database table, check the table definition in the Data Dictionary (SE11) to ensure that the field is defined correctly.
  
  
  Consult Documentation: Review the SAP documentation for the specific context in which you are encountering the error. This may provide additional insights into the expected data types and operations.
  
  
  Testing: After making changes, test the functionality to ensure that the error is resolved and that the application behaves as expected.
  
  
  Related Information:
  
  SAP Notes: Check SAP Notes for any known issues or patches related to this error message. SAP Notes can provide specific guidance or updates that may resolve the issue.
  Data Dictionary (SE11): Use the Data Dictionary to inspect the definitions of the tables and fields involved in the error.
  ABAP Development: Familiarize yourself with ABAP data types and how they interact with database operations, especially when dealing with LOBs.
  
  If the issue persists after following these steps, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.