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AM335x JTAG Connectivity Issue

Other Parts Discussed in Thread: AM3358

hi

we have customized board based on am3358. we have followed all the design guidelines based on am335xevm board. when we are trying to connect the board through blackhawk BHUSB560v2 jtag we are getting error as follows

An error occurred while hard opening the controller.

-----[An error has occurred and this utility has aborted]--------------------

This error is generated by TI's USCIF driver or utilities.

The value is '-230' (0xffffff1a).
The title is 'SC_ERR_PATH_MEASURE'.

The explanation is:
The measured lengths of the JTAG IR and DR scan-paths are invalid.
This indicates that an error exists in the link-delay or scan-path.

kindly tell us what could be the issue bhind this. i already saw the links related to this error in  e2e forum but we dint get any solution.


thanks in advance