Avoid issue while calculating with units?

Questions
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1

(in)

UnitConvert[Quantity[2.6, "Hours"], "Minutes"]

(out)

UnitConvert[QuantityUnits`Private`ToQuantity[QuantityUnits`Private`UnknownQuantity[2.6, "Hours"]], "Minutes"]

I do not understand this output an I cannot find an answer anywhere in the documentation. Any help will be greatly appreciated.

2

Hi Fred,

This works fine for me

UnitConvert[Quantity[2.6, "Hours"], "Minutes"]
(* Quantity[156., "Minutes"] *)

on “12.0.0 for Mac OS X x86 (64-bit) (April 7, 2019)”. What version are you running?

3

That works for me now, too. All the calculations with units work for me now, but they didn’t yesterday. Not sure why.

4

And much thanks for your answer.