Xilinx ChipScope Pro User Manual page 209

Xilinx JTAG Programming Cable Troubleshooting
This section describes how to determine if your Xilinx JTAG programming cable is
connected correctly and how to troubleshoot common Xilinx JTAG (Joint Test Action
Group, IEEE standard) cable connection issues. Here is a list of issues that are covered in
this section:
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ChipScope Pro Software and Cores User Guide
UG029 (v14.3) October 16, 2012
For verifying correct cable connections, see
For troubleshooting issues related to "INFO: Cable connection failed" messages, see
Table A-4, page 211.
For troubleshooting issues related to "ERROR:iMPACT:2246 - A reference voltage has
not been detected..." messages, see
For troubleshooting issues related to "ERROR: No devices detected while scanning
the JTAG chain", "ERROR: Failed detecting JTAG device chain", or "ERROR: Opened
Xilinx Platform USB Cable but failed to detect JTAG Chain" messages, see
page 214.
For troubleshooting issues related to "ERROR: Socket Open Failed.
localhost/127.0.0.1:50001" messages, see
www.xilinx.com
Xilinx JTAG Programming Cable Troubleshooting
Table A-3, page
Table A-5, page 213.
Table A-7, page 216.
211.
Table A-6,
209