>HI!
>I have a form class which is called from the main form. This form class has a procedure where it calls few procedures which are methods of the main form. For some reason VFP sometimes doesn't recognize the name of main form, by which a method is referenced, and sometimes it does. I don't know what I should do at this point to make VFP work properly. I will appreciate a response from anyone.

In addition to what Edward said, for cases (such as the way I use a top-level to control many child forms and the child forms use many top-level PEMs) you can create parent form property(s) so that parents and children can always communicate. An simple example:

Create custom property: Parent.child1 = .NULL.

Now launch child1 from parent:

DO FORM child1 NAME thisform.child1
or thisform.child1 = Createobject('childformclass')

Child1 now refers to parent method, for example, as Parent.Mymethod()

Child2 now refers to child1 method, for example, as Parent.Child1.Somemethod()

An array is good for collecting many child forms...