How To Fix DT243 - Field &: Data type is not allowed

SAP Error Message - Details

• Message type: E = Error

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

• Message number: 243

• Message text: Field &: Data type is not allowed

What causes this issue?

The data type entered is not allowed.

System Response

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

How to fix this error?

Please check whether the domain or the data element for the field is
active. If this is the case, please check the data type entered for the
domain.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DT243 - Field &: Data type is not allowed ?

  The SAP error message DT243 ("Field &: Data type is not allowed") typically occurs when there is an issue with the data type of a field in a data structure, table, or program. This error can arise in various contexts, such as when defining data elements, structures, or when working with ABAP programs.
  Cause:
  
  Invalid Data Type: The field is defined with a data type that is not permitted in the context where it is being used. For example, using a complex data type in a context that only allows simple data types.
  Incompatible Data Types: The field may be trying to use a data type that is incompatible with the expected data type in a particular operation or function.
  Field Length Issues: Sometimes, the length of the field may exceed the allowed limits for the data type being used.
  Incorrect Field Definition: The field may not be defined correctly in the data dictionary or ABAP program.
  
  Solution:
  
  Check Data Type: Review the data type of the field that is causing the error. Ensure that it is a valid and compatible data type for the context in which it is being used.
  Modify Field Definition: If the data type is incorrect, modify the field definition in the data dictionary (SE11) or in the ABAP program to use a valid data type.
  Adjust Field Length: If the field length is an issue, adjust the length to fit within the allowed limits for the data type.
  Review Context: Ensure that the field is being used in a context that supports its data type. For example, if it is being used in a SELECT statement, ensure that the data type is compatible with the database field.
  Check for Updates: If you are using a custom program or enhancement, check if there are any updates or notes from SAP that address this issue.
  
  Related Information:
  
  Transaction Codes: Use transaction codes like SE11 (Data Dictionary), SE80 (Object Navigator), or SE38 (ABAP Editor) to investigate and modify the field definitions.
  SAP Notes: Search for relevant SAP Notes in the SAP Support Portal that may address specific issues related to this error message.
  Documentation: Refer to the ABAP programming guidelines and data dictionary documentation for best practices on defining fields and data types.
  
  If the issue persists after checking the above points, consider reaching out to your SAP support team or consulting with an SAP expert for further assistance.