It sounds like the variable frmmain is out of scope. Try declaring it as public BEFORE you issue the DO FORM... just as a test and see what happens. Also, in your updatemaster.prg, put a 'set step on' and verify you can see frmmain by typing 'frmmain' (without quotes) in the watch window. Also check the _screen.forms array and see if you can see your form there (it may show up there with the actual form name of master though--you can also reference it that way). Otherwise, I'm sorry, but I'm out of suggestions!

Tracy

>Thank you for the samples it works very fine,but the problem still not solved.
>
>My form is a Top level form(frmMain) with three 3 text box bound to memory variables and i created 3 properties also.
>
>i have top level menu in my form.
>
>in my menu, when i click update master, it does do programs\updatemaster
>
>in this updatemaster.prg if i say frmMain.property1=m.value1 i get error message
>Object FRMMAIN not found.
>
>I call the frmmain by DO FORM master name FRMMAIN
>
>txs