can somebody explain this error log

I had one remote backhaul that runs on solar power. The uptime was more than 127 days until I checked few days back and it just showed 1 day uptime. I checked the event log and saw this

1:50:37 UT : 05/07/01 : File C:/ISIPPC/pssppc.250/bsps/devices/whisp/fpgaapi.c : Line 3791 TxVC = 0x000006 NumPendInts = 6
11:50:37 UT : 05/07/01 : File C:/ISIPPC/pssppc.250/bsps/devices/whisp/fpgaapi.c : Line 3792 FatalError()

I wonder what this means, does TxVC mean Transmit Virtual Circuit?