SAP Knowledge Base Article - Preview

3453864 - First SAP GUI connection attempt through a saprouter fails with "timeout"


SAP GUI users are connecting to an ABAP system though a saprouter.

Whenever the saprouter is (re)started, the first SAP GUI connection attempt from the user fails with a "timeout" message like the below:

     NiBufIConnect: route connect '/H/[saprouter_IP]/H/[remaining saprouter string]' timeout

When simulating the issue with the saprouter having being started with trace level 2 (saprouter command line argument "-V 2"), the "dev_rout" trace file reveals very slow DNS responses. For example:

     NiHLGetHostName: to get [IP address of affected end user] failed in 15012ms (tl=2000ms)



  • saprouter
  • SAP NetWeaver ABAP based system
  • ABAP Platform based system


ABAP platform all versions ; SAP NetWeaver all versions


SAP GUI, timeout, saprouter , KBA , BC-CST-NI , Network Interface , BC-FES-GUI , SAP GUI for Windows , BC-CST , Client/Server Technology , BC-NET , Network Infrastructure , Problem

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