If the thermocouple were bad, then chances are the pilot would not remain lit.
Be sure your gas valve is receiving the proper voltage. The gas valve itself may have failed and is not opening. Of if there is no signal to the valve, the thermostat or another electrical component may have failed.
Standing pilot systems are fairly simple, there isn't much that could do wrong.
Answers & Comments
If the thermocouple were bad, then chances are the pilot would not remain lit.
Be sure your gas valve is receiving the proper voltage. The gas valve itself may have failed and is not opening. Of if there is no signal to the valve, the thermostat or another electrical component may have failed.
Standing pilot systems are fairly simple, there isn't much that could do wrong.