DataMember property 'RELATION_Name_Here' cannot be found on the DataSource

[Echooff3]

I'm gonna pull my freakin hair out!!!
This is the second time I had .Net lock me out of one of my forms with this error.

I have a relational dataset and on a particular form there is the master table view and all the relational children views. After a while the IDE appears to not even be checking the structure of the dataset and I get a warning saying that the datamember cant be found on the data source.

When I go into the dataset designer it's there plain as day and spelled exactly right.

snippet:

the warning:
Warning DataMember property 'FK_JACKET_Notes_JACKET_Header' cannot be found on the DataSource.

    '
        'FKJACKETNotesJACKETHeaderBindingSource
        '
        Me.FKJACKETNotesJACKETHeaderBindingSource.DataMember = "FK_JACKET_Notes_JACKET_Header"
        Me.FKJACKETNotesJACKETHeaderBindingSource.DataSource = Me.JacketBS    

And it's in the dataset designer code...

Me.relationFK_JACKET_Notes_JACKET_Header = New Global.System.Data.DataRelation("FK_JACKET_Notes_JACKET_Header", New Global.System.Data.DataColumn() {Me.tableJACKET_Header.IDColumn}, New Global.System.Data.DataColumn() {Me.tableJACKET_Notes.FK_JIDColumn}, false)
        Me.Relations.Add(Me.relationFK_JACKET_Notes_JACKET_Header)

[Echooff3]

Ok I figured it out. Turns out that the IDE generated code somehow lost the datasource in the master Bindingsource. Hence why it could not find the relations.
So I had to dig throught and add the Master table to the Master bindingsource's datasource. The only problem then what I had to go through the forms and reapply the bindings to my textboxes and comboboxes.