Does the class WidgetBuilt exists in your system ?
If not, maybe you should update your pharo version :)

(This class exists in Pharo 20568)

Ben

On Feb 24, 2013, at 6:02 PM, phil@highoctane.be wrote:

I was trying to get the Manuia Memory Monitor to work in Pharo 2.0

Got it working, nothing special: just say Smalltalk vm parameterAt:
xxx instead of the SmalltalkImage current vmParameterAt: xxx

Some Cmd-. needed but worked.

Then, I wanted to have a look at how it worked.

I noticed a class named: MMMemoryUsageIndicadorMorph and wanted to
rename it to MMMemoryUsageIndicatorMorph.

But I got a MNU: receiver of "model:widget:" is nil.

Quite annoying. Screenshot in attach.

Phil
<PharoScreenshot.png>