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Waters

"Unable to communicate with the LND" error message in Configure DHCP Server tab in UNIFI, no communication with Vion IMS QTof - WKB47858

Article number: 47858

SYMPTOMS

  • Unable to bring system online in UNIFI
  • "Unable to communicate with the LND" error message in Configure DHCP Server tab in UNIFI
  • "DHCP failed" error message when connecting to EPC with telnet/putty
  • In the EPC boot sequence, the first instance of connecting to DHCP is always successful (Acquiring DHCP address . . . DHCP OK), but the second instance always fails (Acquiring DHCP address . . . DHCP FAILED). See attached boot sequence
  • Restarting device (LND), WatersServiceHost, EPC, electronics, PC does not resolve the issue

ENVIRONMENT

  • Vion IMS QTof
  • UNIFI workstation

CAUSE

Unknown

FIX or WORKAROUND

  1. Close UNIFI.
  2. Restart DHCP service.
  3. Open HyperTerminal to monitor EPC boot sequence and reboot the EPC.
  4. If same error is seen in boot sequence, restart DHCP service again and reboot EPC again.
  5. If same error is still observed, restart DHCP service again, open UNIFI, and then reboot EPC with UNIFI open and monitor the boot sequence.
  6. Once the boot completes successfully, reopen UNIFI; you may need to restart the device (in Device Management) and/or reset the instrument to establish communication with the mass spectrometer.

ADDITIONAL INFORMATION

The same issue may occur with Xevo G2 family instruments under UNIFI control.

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