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Lexmark MFP Java Client Logs

Article # 3031544 - Page views: 109


How to download Kofax Front Office Server (KFS) MultiFunction Printer (MFP) Java Client Debug logs from a Lexmark MFP device to the KFS server



When troubleshooting issues with the KFS MFP Client, it may be necessary to obtain the Kofax Lexmark MFP Java Client debug logs from the Lexmark MFP device.

To force a Lexmark MFP to collect the Kofax Lexmark MFP Java Client debug logs and write them to the device-Lexmark-<device hostname>.log file on the KFS server:

  1. From any PC that can connect to the MFP, open the Command Prompt as administrator.
  2. Telnet into the MFP device using the following command, where <device ip> is the IP address of the MFP device:
    telnet <device ip> 4242

he Microsoft Windows Telnet Client is not installed by default in Windows 7, 8, 8.1, 10, Server 2008 R2, Server 2012, Server 2012 R2, Server 2016, and Server 2019. To install the Microsoft Windows Telnet Client, enter the following command:

pkgmgr /iu:"TelnetClient"

  1. Once the telnet connection has been established, enter the following command:
  2. As the MFP collects the debug logs, it will write them to the req_queue folder on the MFP device. After the contents of the debug log files have been sent to the KFS server, the MFP will delete the files from this folder. The process is complete once all the files have been deleted from the req_queue folder.
    Periodically enter the following command to display the current list of files in the req_queue folder:
    dir req_queue
  3. When no more files remain in the req_queue folder, enter the following command to close the connection to the MFP and exit telnet:

  4. The content of the Kofax Lexmark MFP Java Client logs has been written to the following file on the KFS server:C:\ProgramData\Kofax\Front Office Server\Log\Webapp\device-Lexmark-<device hostname>.log



This procedure does not apply to the Kofax Lexmark MFP Android Client


Level of Complexity 



Applies to  

Product Version Build Environment Hardware
Kofax Front Office Server 4.3
All All Lexmark MFP Devices




Article # 3031544
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