START_FORM is invalid, OPEN_FORM is missing

Hi All,

I am getting "START_FORM is invalid, OPEN_FORM is missing " error message while printing a production order via CO03.

CALL FUNCTION 'OPEN_FORM'

EXPORTING

device = 'PRINTER'

dialog = space

form = print_co-forml

language = print_co-spras

OPTIONS = print_opts

EXCEPTIONS

canceled = 01

device = 02

form = 03

OPTIONS = 04

unclosed = 05.

While debugging "OPEN_FORM" is giving exception FORM with sy-subrc value 3.

This is arising because no entry with the form name is available in STXH table.

What could be the problem? Please help me.

Thanks,

Vengadesh R