Bring up the properties of your OBX Iterate just like in the ppt you sent. Then click on the green flag above the OBX in the inbound Message Format tree. That should activate the ‘set to basis’ button below the tree (looks like this {…} but colored and with the elipses in the middle).
You should also see the address path for that basis in the display window below the buttons.
I think you will see that address path for the basis for the OBX Group is different than what you have. You will see there are places within the address path inside that display windoe that are opened now for entry. Place your %g1 for the parent group in the appropriate position in the address path, then click the button. Your Basis property in the ITERATE should now be properly set.
Since this is a group, your Variable property of the ITERATE will be a %gx where x is some number rahter than %sx.
If you are still having trouble, email me and I will assist.
email: jim.kosloskey@jim-kosloskey.com 30+ years Cloverleaf, 61 years IT – old fart.