Very similar error.  Running cgminer 4.9.0 using the following .bat file: cgminer.exe -o stratum+tcp://stratum.bitcoin.cz:3333 -u user.worker --au3-volt 750 --au3-freq 225 2>logfile.txt  

Needed to follow the instructions explicitly as directed by Antminer - Downloaded cgminer-run-windows....rar from Antminer. Created .bat file using: cgminer.exe -o stratum+tcp://stratum.bitcoin.cz:3333 --bmsc-options 115200:0.54 -u "user"."worker":"pw" --bmsc-voltage 0800 --bmsc-freq 0982 2>logfile.txt  

This is version 4.6.1

Running at 45 Gh/s (I have a very slow internet connection - may be the issue)

Don't touch the USB cable - causes errors!  I need to change out the cable perhaps.

Miner and power supply running slightly warm.

Robert