The parameter BUYPREXPORTCHANGES specifically controls whether changes made to a Purchase Requisition (PR) in the SAP ERP or S/4HANA system are exported to SAP Ariba. To prevent a cyclic update loop—where a change from Ariba updates the SAP PR, which is then re-exported back to Ariba by the incremental export job—this parameter must be disabled (i.e., not enabled). By disabling it, only the initial creation of the PR is exported, and subsequent changes originating from Ariba and updated in SAP are not sent back, thus breaking the update cycle.

A. BUYPREXPORT: This is a master switch parameter used to enable or disable the entire Purchase Requisition export functionality, not specifically for managing change updates.

B. BUYPRCHANGEENABLED: This parameter controls the import of PR changes from SAP Ariba into the SAP system. Disabling it would also prevent the cycle, but the question concerns the export process.

D. ARBCIGBUYREQ: This is not a valid parameter in the global settings for controlling this specific behavior. It appears more like a technical object name (e.g., a program or BAdI) rather than a configuration parameter.

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1. SAP Ariba Cloud Integration Gateway Documentation: Configuration guide for integrating SAP S/4HANA with SAP Ariba applications using SAP Ariba Cloud Integration Gateway. In the section "How to configure purchase requisitions

" under the subsection for "Defining global settings

" the guide explicitly states: "To prevent cyclic updates of purchase requisitions

do not enable the parameter BUYPREXPORTCHANGES." This confirms that this specific parameter is the correct one to configure to prevent the described issue. (Note: The official guide specifies not to enable this parameter

indicating the question's phrasing might be slightly imprecise

but BUYPREXPORTCHANGES is unequivocally the correct parameter to address the problem).