# S01064 {#S01064}

## Error Code {#error_code .section}

S01064

## Error Message {#error_message .section}

`Column modifications are only supported for OLAP-based DFS tables. RefId: S01064`

## Probable Causes {#probable_causes .section}

This error occurs when function `replaceColumn!`, `dropColumns!`, `rename!`, or ALTER statement is applied to a DFS table that is not OLAP-based.

## Solutions {#solutions .section}

Ensure to apply `replaceColumn!`, `dropColumns!`, `rename!`, or ALTER statement to an OLAP-based DFS table.

**Parent topic:**[Error Code Reference](../../Troubleshooting/ErrorCode.md)

