The Release button in a Customer Invoice in the UI triggers the "SubmitForApproval" action but this action cannot be triggered via PDI.
SAP Business ByDesign
The "SubmitForApproval" Action for Customer Invoices is not PSM released.
We added the PSM release request for the SubmitForApproval action for Customer Invoices into our Product Backlog to be considered for a future release.
submit; Release; Approval; SDK; PDI; PSM; Invoice; BO Instance , KBA , AP-CI-CI , Customer Invoice , Problem