Hi John,
It seems the interface is recognized as it's displayed in the P&E Connection Assistant.
Most of the time (from my experiences) I met similar problem when the connection on board was wrong (wrong port).
Now if there is a problem with the P&E driver, on the P&E web site you will find some information which could help you but for me it's not the problem.
Please have a look to:
P&E Microcomputer Systems
P&E Microcomputer Systems
This morning I've performed some tests on my side.
The configuration used was:
- Multilink Universal rev.B
- TWR-K21D50M with TWR-ELEV
Test_1: Multilink plugged on PC -> not connected on board.
On Multilink only the led blue was lighted.
Here I got same message:

Test_2: Multilink plugged on PC -> connected to the board but board power off.
On Multilink only the led blue was lighted.
Launching the debug session, the same error appears.
Test_3: Multilink plugged on PC -> connected to the board and board power on.
On Multilink the leds blue and orange were lighted and the application is loaded on board.

For me you've a problem between the Multilink and board.
This could be due to wrong on-board port used or power supply.
Have a great day,
Pascal
NXP Technical Support
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