How To Fix AD649 - No. of key fields > &. Conversion to type & not allowed

AD649 - Overview

• Message type: E = Error

• Message class: AD - Data Dictionary application messages

• Message number: 649

• Message text: No. of key fields > &. Conversion to type & not allowed

What causes this issue?

The table type cannot be changed because the number of key fields for
this type is too large.
For example, a transparent table contains at most 16 key fields. A
table with more than 16 key fields therefore cannot be converted into a
transparent table.

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?

If you want to change the table type, you must first remove fields from
the key.

Error message extract from SAP system. Copyright SAP SE.

Smart SAP Assistant

• What is the cause and solution for SAP error message AD649 - No. of key fields > &. Conversion to type & not allowed ?

  The SAP error message AD649 indicates that there is an issue with the number of key fields in a data structure or table exceeding the allowed limit for a specific operation. This error typically arises when you are trying to convert or manipulate data types that have a defined maximum number of key fields, and the operation you are attempting exceeds that limit.
  
  Cause:
  
  Exceeding Key Field Limit: The error occurs when the number of key fields in a data structure exceeds the maximum allowed number for the operation you are trying to perform. In SAP, certain data types and structures have limitations on how many key fields they can contain.
  Data Type Conversion: The error can also arise during data type conversion when the source structure has more key fields than the target structure can accommodate.
  
  
  Solution:
  
  Review Data Structures: Check the data structures involved in the operation. Ensure that the number of key