Question: Unit Formatting

I have a problem with the right-click command „Unit Formatting“. Here is an example: I am trying to get in result in kW instead of W. This works as long as the value is assigned to the variable using := . If the value is calculated I cannot change the unit.

Right-clicking P and P2 and selecting „Unit Formatting“ I get the following selection menu

Right-clicking P3 offers no units to be selected. Entering a Custom Unit returns an error message.

Is that behaviour normal for Maple or am I making a mistake?

 

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