>>> If PemStatus(This, lcCheckProp, 5)
>>> lcProperty = 'This.' + lcProperty
>>> luReturn = &lcProperty
>>> Else
>>> If Type('This.Parent') == T_OBJECT
>>> luReturn = This.Parent.muGetValue(lcProperty)
>>> Else
>>> luReturn = NULL
>>> EndIf
>>> EndIf
>>
>>Since your oChild is the same class as the oParent your code is always reading the property from oChild in the code above.
>
>But why would it occur on only one machine? Maybe the testing is not being done equally?

I run a test-program which sets some properties and calls some methods. I run the same testprogram on all machines, so this should ensure the same testing I think.