How To Fix FDT_EXPRESSIONS549 - Table &1 has single column; only 'TABLE_LINE' can be specified as column

SAP Error Message - Details

• Message type: E = Error

• Message class: FDT_EXPRESSIONS - Formula & Derivation Tool: Expressions

• Message number: 549

• Message text: Table &1 has single column; only 'TABLE_LINE' can be specified as column

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.

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Smart SAP Assistant

• What is the cause and solution for SAP error message FDT_EXPRESSIONS549 - Table &1 has single column; only 'TABLE_LINE' can be specified as column ?

  The SAP error message FDT_EXPRESSIONS549 indicates that there is an issue with the way a table is being defined in a data structure or expression. Specifically, the error states that the table you are trying to use has only a single column, and therefore, only the 'TABLE_LINE' can be specified as a column.
  
  Cause:
  This error typically occurs in the context of using the SAP Fiori Design Time (FDT) or when working with data definitions in ABAP programs. The root cause is that the system expects a table structure with multiple columns, but the specified table only has one column. In such cases, the system does not allow you to specify any column other than 'TABLE_LINE', which is a special identifier used for single-column tables.
  
  Solution:
  To resolve this error, you can take the following steps:
  
  
  Check Table Definition: Verify the definition of the table you are working with. Ensure that it is defined correctly