>>>Ok... so what did I do wrong??? I thought the This.Interval = 0 would stop any events occuring while I was tracing this code.... and there was one other timer on the form, and I set it to 0 also in its properties.
>>
>>You may want to disable timer this.enabled = .f. right before SET STEP ON.
>
>Same thing happened again.... sigh....

In addition, instead of Set STEP ON try using ASSERT .F. message "Testing Timer's code"