3722152 - Error "HTTP/1.1 406 Not Acceptable" when making OData API call using OData V4 adapter in Cloud Integration

• When executing an OData API call via the OData V4 adapter, the request fails with HTTP status 406 – Not Acceptable. 
• The following error message is returned: 
  The resource identified by the request is only capable of generating response entities which have content characteristics not acceptable according to the accept headers sent in the requestnull [HTTP/1.1 406 Not Acceptable]
• In the LJS trace, the request and response details show: 
  ODataV4_Adapter_Request_Headers:
    Accept                   : application/json;odata.metadata=full
    Authorization            : Basic ********
    Content-Type             : application/json;odata.metadata=full
    OData-MaxVersion         : 4.0
    OData-Version            : 4.0
    OriginalPayload          : <?xml version='1.0' encoding='UTF-8'?><ProjCustFieldsSet>
    Proxy-Authorization      : Bearer ********
    query                    : xxxx
    sap-client               : xxxxx
    SAP-PASSPORT             : 2A54482A0300E600004350495F7A67322D7375622D7072642D30302D6575617A303100000000000000000000000000000000000000000000000000000000000000000000000000000000004D657373616765526563657074696F6E00000000000000000000000000000000000000000000000000004350495F7A67322D7375622D7072642D30302D6575617A30310000000000000064616332373331366337303834393265386330386333636536636635313633650000000014DAC27316C708492E8C08C3CE6CF5163E7D592333D8BD43F7A9237981890B9AA700000001000000002A54482A
    SAP_MessageProcessingLogID: xxxx
    SAP_MplCorrelationId     : xxxx
    SAP_PregeneratedMplId    : xxxx
    X-CSRF-Token             : fetchHTTP Status Line:HTTP/1.1 406 Not Acceptable 
  ODataV4_Adapter_Response_Headers:
    content-type             : application/json;odata.metadata=minimal;charset=utf-8
    content-length           : 930
    x-csrf-token             : xxxx
    content-language         : en
    odata-version            : 4.0
    sap-server               : true
    sap-perf-fesrec          : 53929.000000
    set-cookie               : sap-usercontext          = xxxx; path=/;
    set-cookie               : SAP_SESSIONID_PS4_400    = xxxx; path=/; HttpOnly;ODataV4_Adapter_Response_Body:
  {"error":{"code":"/IWCOR/CX_OD_NOT_ACCEPTABLE/005056A509B11ED19BEB6513AA349DA5","message":"The resource identified by the request is only capable of generating response entities which have content characteristics not acceptable according to the accept headers sent in the request","@SAP__common.ExceptionCategory":"Client_Error","innererror":{"ErrorDetails":{"@SAP__common.Application":{"ComponentId":"PS-ST","ServiceRepository":"xxxx","ServiceId":"xxxx","ServiceVersion":"0001"},"@SAP__common.TransactionId":"dac27316c708492e8c08c3ce6cf5163e","@SAP__common.Timestamp":"20260128120500.883563","@SAP__common.ErrorResolution":{"Analysis":"Use ADT feed reader \"SAP Gateway Error Log\" or run transaction /IWFND/ERROR_LOG on SAP Gateway hub system and search for entries with the timestamp above for more details","Note":"See SAP Note 1797736 for error analysis (https://service.sap.com/sap/support/notes/1797736)"}}}}} 
• The response body contains an OData error raised by the backend service.

• SAP Integration Suite
• SAP Business Technology Platform
• Cloud Integration

HTTP 406, Not Acceptable, OData GET call, OData V4 adapter, odata.metadata=full, odata.metadata=minimal, Accept Header, API error, response entities, content characteristics, SAP Integration Suite, OData API, cpi, cloud integration , KBA , LOD-HCI-PI-CON-OD , OData Adapters , Problem