Error (261003): Can't continue the established JTAG communication. Reconnect communications cable and device. - Error (261003): Can't continue the established JTAG communication. Reconnect communications cable and device. Description Due to a problem in the Quartus® II software version 12.0, you may see this error message when using debug tools that depend on JTAG communication. This problem may result in JTAG communication errors or corrupted data. This problem affects debug tools such as the SignalTap™ II Logic Analyzer and In-System Sources and Probes. Resolution To work around this problem, download and install patch 0.dp3 for the Quartus II software version 12.0 from the related solution below. This problem is fixed beginning with the Quartus II software version 12.0 SP1. Related Articles Error (261003): Can't continue the established JTAG communication. Reconnect communications cable and device How do I address known software issues for Stratix V, Arria V, and Cyclone V devices in the Quartus II software version 12.0? Custom Fields values: ['novalue'] Troubleshooting novalue False ['novalue'] ['FPGA Dev Tools Quartus II Software'] novalue 12.0 ['Programmable Logic Devices'] ['novalue'] ['novalue'] ['novalue']