I am unable to connect the imx6ULL EVK using commander 7.86b. I can move the unit to another board using an iMXRT component and can connect fine so the JLINK and cable seem to be OK. Not sure where to go from here.

Sample Session I am getting:

Type "connect" to establish a target connection, '?' for help
J-Link>connect
Please specify device / core. <Default>: MCIMX6Y2
Type '?' for selection dialog
Device>
Please specify target interface:
J) JTAG (Default)
S) SWD
T) cJTAG
TIF>
Device position in JTAG chain (IRPre,DRPre) <Default>: -1,-1 => Auto-detect
JTAGConf>
Specify target interface speed [kHz]. <Default>: 4000 kHz
Speed>100
Device "MCIMX6Y2" selected.


Connecting to target via JTAG
ConfigTargetSettings() start
J-Link script: Setting up AP map
ConfigTargetSettings() end - Took 424us
Could not measure total IR len. TDO is constant high.
Failed to identify target. Resetting via Reset pin and trying again.
ConfigTargetSettings() start
J-Link script: Setting up AP map
ConfigTargetSettings() end - Took 858us
Could not measure total IR len. TDO is constant high.
Cannot connect to target.
J-Link>