# S01015 {#s01015}

## Error Code {#error_code .section}

S01015

## Error Message {#error_message .section}

`The number of columns of the current table must match that of the target table. RefId:S01015.`

## Probable Causes {#probable_causes .section}

When using the `append!` function to write data to a DFS table, the number of columns to be appended does not match that in the target table.

## Solutions {#solutions .section}

Use the `schema` function to check if the column count could match.

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

