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Connection error on evalkit 'omapl138' using xds100v2

Other Parts Discussed in Thread: AM1808, OMAP-L138, OMAPL138

Hi all,

Did anyone encounter the following error before? I excerpted this error from test connection in code composer studio version 5.2.0.00069. Any advice will be appreciated.

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

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

The value is '-154' (0xffffff66).
The title is 'SC_ERR_FTDI_WRITE'.

The explanation is:
One of the FTDI driver functions used to
write data returned bad status or an error.

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Currently, I'm using the LOGIC PD Omapl138 experiment kit as my development platform with XDS100v2  Spectrum Digital emulator. I have followed the step of configuration mentioned in "How to connect to the OMAP-L138/C6748/AM1808 EVM board using CCS" (http://processors.wiki.ti.com/index.php/How_to_connect_to_the_OMAP-L138/C6748/AM1808_EVM_board_using_CCS%3F). Besides, the emulator USB's VID & PID shown in device manger are 0403 and A6D0 respectively. Can I say that the device driver is deemed to be installed properly?So,  what kind of step I can perform to debug the error?