Richard or Mariano - I am in the same boat as the OP, such that I have Contracts and would like to use eConnect to create multiple releases (Invoices) for them.
If you look at the screen below, you'll note that the Contract and three underlying Invoices all have the same master number (my company does partial fulfillment of Contracts, thus the multiple invoices). Based on my experience, the ONLY was these SOPTYPEs are tied together on this form is via the Master Number which can only be achieved by using the "Transfer" function on the SOP Entry window. If this is correct, is there any way using eConnect to keep the form below updated when creating a new Invoice transaction?