I have a form and several sub forms on different tabs that are linked on the
primary key of the main form and foreign key in the sub forms. When I go into
the properties of the form/subform and click on either the link child or
master fields to change the linking I get a message saying "Can't build a
link between unbound forms", and don't get the field linker box to open.
Access then takes out the field name in the child or master link line that I
was on. The forms are bound by their respective queries.

I can link the 2 manually by putting in the fields, but not with the field
linker box. I can create a link between the forms and wizard, but get the
error when I manually attempt to change them.

Even when I create a new form with a sub form that doesn't have tabs I get
the same error.

There are relationships between all of the tables.

The form/subform connections work 99% of the time, but I get a ODBC call
error on the sub form (connected to SQL Server 2000 Back end.) every once in
a while, and then lose connection to all the sub forms. I am trying to figure
out if the 2 things are connected.

Thanks in advance for your help, I really appreciate it.

Dolfan