i have created a display only forms in my vendor forms
You mean Display-Only field and not form? I suppose that for the response bellow

i have an escalation run in each record in the vendor forms, push "123" in the display only forms
You must use a Set Fields in the escalation to set the 123 value in your Display-Only Field.
after that in the escalation i do a command line : PERFORM-ACTION-APPLY
You don't need to use this Run Process. Furthermore the PERFORM-ACTION-APPLY works only for Active Links...

The Set Fields in your escalation do it for you...