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Lexmark MX910

Lexmark MX910

900 Firmware Error with Forms and Barcode Card on the MX91x Series MFP


hat you will see

The following 900.00 firmware errors, or similar, are generated when attempting to merge forms:

  • 5610 P4. DoMerge page4/mem/p4memcmn.c-1405: free: bad size (addr:8805dcfc size:00000000)
  • 6605 P4. DoMerge page4/mem/p4memcmn.c-1405: free: bad size (addr:41c0fcfc size:00000000)
  • Process P4. DoMerge:7269 caught SIGSEGV
These errors occur when... After...And, after...
You attempt to merge or execute a forms merge text(.txt) file against LW50.MG.P543 Forms Merge/BarCode (FMBC) DLE RIP firmware.You use the Forms Manager utility to initialize the printer...You add the Forms Merge formset file (.FDD) to the printer.

Affected products

This issue was first seen on a MX910de containing LW50.MG.P543 FMBC firmware; however, printers with similar firmware architecture may also exhibit this issue.


Contact Lexmark Technical Support to request LW50.MG.P558 FMBC firmware or greater, or request that this firmware be made available for your printer.

Still need help?

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When calling for support, you will need to provide your printer model/machine type and serial number (SN). Please be near the products described in this article to expedite the support process and reduce call-back situations.


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