SAP Knowledge Base Article - Preview

3796077 - NWBC For Desktop logon failed : shows error or "preparing logon" after s/4hana 2025 upgrade

Symptom

  • After upgrading to S/4HANA 2025, NWBC For HTML cannot be used as described on 3446972, using SAP Business Client instead.
  • In NWBC For Desktop, after configuring system info and login, below issues occurs:
  • 1. if set system url as  :  http://sever:8000/ui2/nwbc/. the message "preparing logon" is shown and the screen becomes unresponsive.
  • 2. if set system url as :  https://server:44300/ui2/nwbc/, error shows: “logon failed: specified url can’t open logon window to the server … Error detail: 12002”, browser test shows the same.


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Environment

  • SAP S/4HANA 
  • SAP Business Client for Desktop

Keywords

nwbc, business client, s/4hana 2025 upgrade, cannot open nwbc, preparing for logon, ログオン準備中, desktop client hang, err_ssl_protocol_error, error 12002, sicf, systemloginjs, ui2 services, blank page, icm trace, https login error , KBA , BC-FES-BUS-DSK , SAP Business Client for Desktop , Problem

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