How To Fix DT266 - Type of key field & is a table type

DT266 - Overview

• Message type: E = Error

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

• Message number: 266

• Message text: Type of key field & is a table type

What causes this issue?

You assigned the attribute 'key field' to a structure field whose type
is a table type. The runtime environment cannot handle this, so that it
is not activated.

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?

Remove the attribute 'key field' from the corresponding field and check
or activate the structure again.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message DT266 - Type of key field & is a table type ?

  The SAP error message DT266 typically indicates that there is an issue with the definition of a key field in a table type. This error can occur in various contexts, such as when defining a table type in ABAP or when working with data structures that involve table types.
  
  Cause:
  The error message DT266 is triggered when:
  
  A key field is defined in a table type, but it is not allowed to be a key field due to the nature of the table type.
  The table type is defined incorrectly, possibly due to a mismatch in the data structure or incorrect attributes assigned to the fields.
  
  
  Solution:
  To resolve the DT266 error, you can take the following steps:
  
  
  Check Table Type Definition:
  
  Review the definition of the table type in the Data Dictionary (SE11).
  Ensure that the key fields are defined correctly and that they are appropriate for the table type you are using.
  
  
  
  Modify Key Fields:
  
  If the table type