[c-nsp] Cisco 3548XL Switch Error -- Assert failure in ../src-l2-les-common/stp_les_shim.c line 1255

[Devon True]

Cisco-nsp:

I am getting the following errors repeatedly on my Cisco 3548XL switch:

	Assert failure in ../src-l2-les-common/stp_les_shim.c line 1255

I did a Google search and came up empty for that exact error string. 
Anyone have any ideas what this error means?

--- show ver ---

Cisco Internetwork Operating System Software
IOS (tm) C3500XL Software (C3500XL-C3H2S-M), Version 12.0(5)WC3b, 
RELEASE SOFTWARE (fc1)
Copyright (c) 1986-2002 by cisco Systems, Inc.
Compiled Fri 15-Feb-02 10:51 by antonino
Image text-base: 0x00003000, data-base: 0x00337600

ROM: Bootstrap program is C3500XL boot loader

TBLou2-tapebu-01 uptime is 1 minute
System returned to ROM by reload
System image file is "flash:c3500XL-c3h2s-mz.120-5.WC3b.bin"


cisco WS-C3548-XL (PowerPC403) processor (revision 0x01) with 
16384K/1024K bytes of memory.
Processor board ID FAA0510I06X, with hardware revision 0x00
Last reset from warm-reset

Processor is running Enterprise Edition Software
Cluster command switch capable
Cluster member switch capable
48 FastEthernet/IEEE 802.3 interface(s)
2 Gigabit Ethernet/IEEE 802.3 interface(s)

32K bytes of flash-simulated non-volatile configuration memory.
Base ethernet MAC Address: 00:05:5E:11:8E:80
Motherboard assembly number: 73-3903-11
Power supply part number: 34-0971-02
Motherboard serial number: FAA051000P4
Power supply serial number: APQ0442025R
Model revision number: R0
Motherboard revision number: B0
Model number: WS-C3548-XL-EN
System serial number: FAA0510I06X
Configuration register is 0xF

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Devon