Home > VMware > VMware: Error in the RPC receive loop: RpcIn: Unable to send.

VMware: Error in the RPC receive loop: RpcIn: Unable to send.

After upgrading a Terminal Server or Terminal Server-based Citrix XenApp virtual machine to VMware Tools 5.x, you experience these symptoms:

In the Windows Application Event log, you see this error reported multiple times in quick succession (log spew):



[ warning] [vmusr:vmusr] Error in the RPC receive loop: RpcIn: Unable to send.



This issue occurs when the VMware Tools daemon (vmtoolsd) handles more than two Terminal Sessions. When a user connects to a Windows virtual machine, each terminal session should have one vmtoolsd running; however, vmtoolsd is limited to only two sessions running simultaneously. Thus the Windows Application Event log fills up with warning messages similar to this until the total connection count is >2  per session:
[vmusr:vmusr] Error in the RPC receive loop: RpcIn: Unable to send


This is correct:



To work around this issue, disable VMware Tools logging to the Event Log and general virtual machine logging to the vmware.log file for the virtual machine.

To disable VMware Tools application event logging:

  1. Open the tools.conf file using a text editor. The tools.conf file is located at:
    • Windows XP and Windows Server 2000/2003:
      C:\Documents and Settings\All Users\Application Data\VMware\VMware Tools\
    • Windows Vista, Windows 7, and Windows Server 2008:
      C:\ProgramData\VMware\VMware Tools\
    • Linux:
  2. Add this section to the tools.conf file:[logging]
    vmusr.level = error
    vmsvc.level = error
  3. Save and close the file.
  4. Restart the VMTools service (Administrative Tools > Services).
    Note: If there are users logged in to more than one session, restarting the VMTools service may not be sufficient. You may have to kill the vmtoolsd.exe process for all instances.

More information: VMware


Sander Daems is founder and author of this blog and working as a Lead (Sr.) Consultant by UNICA ICT Solutions. Sander has over 15 years experience in IT, primary focus: virtualization and modern worksplace.

More Posts - Website

Follow Me:

Categories: VMware Tags: , , , , ,
  1. November 20th, 2014  (Quote) at 09:24  (Quote) | #1

    VMware ESXi 5.1, Patch ESXi510-201212402-BG: Updates tools-light

    The patch fixes the issue. Impact: none. Just roll out the hotfix with UpdateManager.

  1. No trackbacks yet.