signal server cs1000

[extreme10]

IPL>
MAY 15 08:55:50 tShell: Warning User <admin2> has logged into the system.trcStack aborted: error in top frame
tShell restarted.

IPL> itgCardShow

Index : 0
Type : EXUT
Role : Follower
Node : 0
Leader IP : 192.36.61.195
Card IP : 192.36.61.194
Card TN : Slot 20
Card State : ENBL
Uptime : 428 days, 15 hours, 26 mins, 40 secs (37034800 secs)
Codecs : G711Ulaw(default), G711Alaw, G711CC, T38FAX
ELAN (ixpMac1) stat: 10 Mbps, Half duplex (Carrier OK)
TLAN (ixpMac0) stat: 100 Mbps, Full duplex (Carrier OK)

value = 1 = 0x1
IPL> trcStack aborted: error in top frame
tShell restarted.

This is what was printed when I logged in to show
what does error in top frame mean?