A substitution rule for BKPF-BKTXT

Hi All,

I've created a substitution rule for BKPF-BKTXT (document header) as follow:

prerequisite: BKPF-BLART = 'ST'

substitution:  BKPF-BKTXT = Constant value "CLEARED"

Later I've activated the rule and assigned to the company.

The rule doesn't work.

Could anyone help me?

Thanks

G.