**** BEGIN LOGGING AT Thu Sep 28 03:00:02 2017 Sep 28 22:55:46 i'm using openocd to jtag program several xilinx/digilent devices: cmoda7, arty, kintex kc705 and virtex vcu108 .. they all work except the last one (vcu108) which gives JTAG setup errors Sep 28 22:56:36 Error: JTAG scan chain interrogation failed: all ones Error: Check JTAG interface, timings, target power, etc. Error: Trying to use configured scan chain anyway... Error: xc7.tap: IR capture error; saw 0x3f not 0x01 Warn : Bypassing JTAG setup events due to errors Sep 28 22:56:51 any pointers greatly appreciated **** BEGIN LOGGING AT Thu Sep 28 23:16:10 2017 **** ENDING LOGGING AT Fri Sep 29 03:00:01 2017