Hi
On my side I have UMultilink Rev A, B and C but I don't have Rev D.
From my view, if your multilink universal can not work with CW5.1, I may suggest you consider check and update multilink universal firmware.
As multilink universal is P&E product, please contact P&E for it:
P&E Microcomputer Systems: Over 30 years as an Industry leader in Embedded Systems Development Tools...
Have a great day,
Jennie Zhang
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