Are there known do's and don't when using pageframes within pageframes?

I am creating a form based on "cBizObjNoListMaintForm" where I have
placed a pageframe on the first page of the pageframe provided as part
of the class (parent pageframe). The second pageframe's(child)purpose is to have enough field space for the business object I placed on page 1 of the parent pageframe. No controls or additional business objects will be added to this child pageframe.

When I try to enter the builder for the business object on page one of
the parent pageframe, the builder gets errors in the following order:
1) In statusbar the message "SecurityDBC_Name not found in APPINCL.dbf"
2) Error message appears:
Program Error
"PAGES" is not object
3) After continuing:
MereMortals Builder
Alis MMEC_Pagessecurity is not found

USE in MMEC_PageSecurity.

Are there specific do's and don't when using/adding pageframes to forms and other pageframes in the framework?

I change the page names from PAGE3, PAGE4, etc to meaningful names for the pages I added to both the parent and child pageframes. PAGE1 and PAGE2 could not be changed. Is changing the page names part of my problem?