We use a lot of incremental numbers around our application for various things, however, I haven't had much experience with placing them in subforms on success of the parent form. This is what I've tried to write so far, and it comes up with errors:

if (input.SUBFORM_NAME.RADIO_FIELD  ==  "Increment required")

{

    x  =  MaxValueHolder  [ID != 0];

    input.SUBFORM_NAME.SUBFORM_FIELD = (x.highestval  +  1);

    x.highestval = (x.highestval  +  1);

}

ERROR: expects = on line 16

I'm sure its simple, but I'm not too sure