Hi,

I am using latest Pharo 3.0 + vm.

I have a method width with
width

        ^ 115 * self ratio.
in my understanding it returns a Number.

When I try to create a method
negatedWidth

        ^   - (self width).

the UI tells me that only Numbers may be negated. I am not able to save the method. Am I on a wrong path or should that work and if how can I avoid the UI error message?

Regards

Max

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