Why do you need to automatically create a record in the related table when a new record is created in the first table?
If you have this relationship:
DataTable::__pkDataTableID = MarkItTable::_fkDataTableID
You can enable "allow creation of record via this relationship" for MarkItTable in the above relationship. You can then add a field formatted as a check box from MarkitTable to the DataTable layout or to a portal based on DataTable. If you click the check box, a value will be assigned to the related table in MarkItTable. If no such related record exists, one is created automatically.
Thanks. I thought I tested this and it didn't work. Obviously I had an error as I just tried it again and it worked great. Thx.
As I have 8 related files to do this in this will make it much easier.