Hi Raine,

How would you want to decide whether the input value is correct or not without allowing Moi to start a calculation? I guess MoI always have to perform the calculation and the issue is that for the inappropriate value of a chamfer, fillet ... the computation can be done immediately as well as it can be time-consuming so "Calculating" button appears.

Maybe, the border of the input box could change its colour when command aborts due to improper input. It means you would be sure enough that after clicking the input box MoI doesn't stop performing current operation...

Petr