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Calling SOAP Service using HTTPClient Getting error "Server requires client certificate"
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  1. DIPANJAN DUTTA
  2. PowerBuilder
  3. Thursday, 18 September 2025 11:26 AM UTC

Hello All,

Recently, I encountered an challenge while integrating a SAP SOAP Webservice with PowerBuilder 22 application using the HTTPClient object. Here I am getting an error no -16 that means "Server requires client certificate".

This error indicates that the server expects a client-side certificate to authenticate the request. Without it, the connection is rejected.

I am calling a SAP SOAP Webservice in PowerBuilder 22 using HTTPClient.

To address this, I installed a public certificate (.cer file) and attempted to configure it using the SetClientCert method in PowerBuilder. Here's the code snippet I used:

 

ls_certSN = "03de4b55000000000000000008700"
ls_certIssue = 'CN = devsap-abap.test.com~r~nO = Test Services, Inc.~r~nL = Richmond~r~nS = Virginia~r~nC = US'

li_ret = lnv_HttpClient.SetClientCert("Trust", ls_certIssue, ls_certSN)

 

The SetClientCert  function returned 1, which means success. However, despite this, the same error persisted when I tried to invoke the service.

 

 

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