For the following accepted class definition (so presumably leading zero is a valid instance variable name), from the menu selecting "Refactor class > Accessors" fails with "Error: End of statement list encountered EpcimIdentifiedObject subclass: #EpcimBaseVoltage instanceVariableNames: '0nVoltageLevel' classVariableNames: '' poolDictionaries: '' category: 'IEC61970-Core' If I take away the leading zero on the instance variable it works okay. I can get by with it not working but wondered whether I log a bug report or am I doing something wrong? I do want to keep the leading zero because I am using it to mark the multiplicity of associations (eg see BaseVoltage/Voltage down the bottom of [1]). [1] http://forum.world.st/forward-engineering-UML-models-into-Smalltalk-code-td3...