"Port already in use" Error When Attempting to Connect DS-5 to Multiple USB Blaster Targets - "Port already in use" Error When Attempting to Connect DS-5 to Multiple USB Blaster Targets Description The ARM DS-5 debugger supports connecting to only a single USB Blaster debug target at a time on a given host. If you attempt to launch multiple USB Blaster debug connections, DS-5 displays error messages such as the following: Unable to connect to Altera-SoCFPGA-HardwareLib-FPGA-CV-GNU-Debug. The script file (debug_server.py) failed during execution: Port 3010 is already in use Resolution Use a separate PC or virtual machine to debug each target. Custom Fields values: ['novalue'] Troubleshooting novalue True ['novalue'] ['FPGA Dev Tools Quartus II Software'] 13.1 13.0 ['Arria® V FPGAs and SoCs', 'Cyclone® V FPGAs and SoCs'] ['novalue'] ['novalue'] ['novalue']