Transactions sent to SAP ERP fail on the SAP Integration Suite, managed gateway for spend management and SAP Business Network side with error:Response was of unexpected text/html ContentType. Incoming portion of HTML stream: (none)

The concerned webservice does not exist on SAP ERP side.

For transactions that send SOAP messages to SAP ERP, the webservice alias must be published on SAP ERP side and also must match with the endpoint address posted by SAP Integration Suite, managed gateway for spend management and SAP Business Network.

• Publish the interface via the Set Up the Interface in the SPRO configuration of the concerned integration scenario
• If the interface is already published, make sure the end-point URL used by SAP Integration Suite, managed gateway for spend management and SAP Business Network is the same published on SOAMANAGER

For example, for BusinessPartnerSUITEBulkReplicateRequest transaction, the endpoint pointed on Managed Gateway for Spend&Network is http://domain/sap/bc/srt/xip/arba/businesspartnersuitereplicaterequest/client where domain is the virtual host configured on your Managed Gateway for Spend&Network connection and client is the SAP ERP client.

When checking the same on SOAMANAGER, the Alternative Access URL should be exactly the same used by Managed Gateway for Spend&Network.

SAP Integration Suite Managed Gateway > Managed Gateway for Procurement
SAP Integration Suite Managed Gateway > Managed Gateway for Sourcing Integration