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Lexmark C950

Lexmark C950

Intermittent print spooler crash or Print jobs stuck in the print queue

Issue description

Affected products

  • Any supported Windows operating system using UPD 2.6 or lower (PCL 5, PCL, XL, and PS).
  • Any older product-specific drivers.

What you will see

  • Intermittent or random print spooler crash or hang that requires a restart of the print spooler service to recover printing functionality.
  • Print queue shows "Printing" or “Sent to printer” with no response from the printer.
  • Print queue shows "spooling printing deleting" or “Sent to printer” and the job is stuck.

Note:  "Sent to Printer" messages are normal and dependent upon the driver's language monitor. This message can appear for up to five minutes.


To resolve this issue, the language monitor must be disassociated from the print driver.

How to disable the language monitor



To open the Registry Editor, right-click or tap-and-hold the Start button and then choose Run.


In the search box or Run window, type the following:

  • regedit and then press Enter.


When the Registry Editor opens, go to:

  • For 64 bit OS (x64 bit OS)
    • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print\Environments\Windows x64\Drivers\Version-3\Lexmark Universal v2 PS3
  • For 32 bit OS (x86 bit OS)
    • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print\Environments\Windows NT x86\Drivers\Version-3\ Lexmark Universal v2 PS3


Locate the registry key labeled Monitor, then double-click to open it.


Delete the value data and make sure its blank then click OK.


Restart the Spooler.

How to delete the language monitor DLL from the system (Optional)




To delete the Dynamic-link library or DLL files, type the following in the search box or Run window,

  • For 64 bit OS (x64 bit OS)
    • C:\Windows\SysWOW64
  • For 32 bit OS (x86 bit OS)
    • C:\Windows\System32


Then delete the DLLs named:

  • LMUD1N32comc.dll
  • LMUD1Oinpa.dll
  • LMUD1Olang.dll


  • Lexmark Communication Service (LCS)-dependent app (e.g., Lexmark Status Messenger ) may cease to function.
  • Use Local Printer Management Agent (LPMA).

Related article

See Lexmark Universal Print Driver release notes for the latest release notes.


RequirementRelevanceHow to obtain

Driver type and version

This information is used for simulation and analysis.

  1. Go to Start > Control Panel > Printers or Devices and Printers.

  2. Right-click the Printer Object being used, and then click Properties.

  3. Go to About Tab, and then take a screenshot or, from the Printing Preferences > Help > About Tab and take a screenshot.

Driver setup (Point-and-Print, Direct IP, or Local port, indicate what port type)

This information is used for simulation and analysis.

End user provided

Customer's printing environment:

  • Operating System involved
  • Server and Client Information (Complete with Name, Service Pack & System Type)

Example: Windows Server 2008 Enterprise R2 SP2 x64 with Windows 7 Professional SP1 x86 clients

This information is used for simulation and analysis.

  1. Click on Start > Run.

  2. Type “msinfo32”, and then click OK.

  3. Click on File > Save.NFO.

Menu Settings Page

This document contains all the printer settings and running firmware code.

a. Using the printer Control Panel – On the printer, press Menu > Reports > Menu Settings Page.

b. Using the Embedded Web Server (EWS) – Access the printer's EWS, go to Reports > Device Settings. Copy and paste the displayed information to a notepad or text editor.

Event Log Information (System, Windows Activity, Event Logs)

This information is used for simulation and analysis.

Windows Logs (.evt or .evtx):

For example:

Navigate to Administrative Tools > Event Viewer > Windows Logs, and then:

  • Right-click the appropriate log file (Application, Security, System, Directory Service, or File Replication Service).
  • Click Save Log File As...
  • Type a name for the file, and click Save.

Click here for more information on archiving Event logs.

Windows XP Information

EV Ticket References

Note:  Driver performance issues should be escalated to the software engineering team for evaluation. Unconfirmed driver fixes should not be distributed without engineer approval.

EV Escalation Ticket #Symptoms


LMUD associated language monitor crashes

Event Viewer example showing Langmon crash:

  1. Open Event Viewer.

  2. Expand Windows Logs (left-hand pane)

  3. Select Application.

  4. Under Actions, select Find... (right-hand pane)

  5. Enter LMUD, or LANG, and click Find Next.

  6. Look for Windows Error Reporting....


  • Slow printing
  • Slow to display print dialog within application
  • LMUECNLANG.dll is crashing the Windows 2003 Print Spooler

See Slow Driver Responsiveness when Opening Printing Preferences or Print Dialog for more information.

Additional information

Other Print Spooler Hangs or Crashes


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