Details

This message is generated when the second argument in ColumnForm is an expression other than Left, Center, or Right.
Off[message] switches off the message; On[message] switches it on. For example: Off[ColumnForm::colmh].

Examples

An error occurs in this example because Top is not a valid value for the second argument:

Wolfram Language code: ColumnForm[{12345678, 12345, 12}, Top]

This shows a valid value for the second argument in ColumnForm:

Wolfram Language code: ColumnForm[{12345678, 12345, 12}, Right]

Top