On 20-10-2013 1:46, Alain wrote:

>
> There is a possible problem if the variable Thickness is set to zero.
> Here a slightly revised code to take care of that possiblility:
>

Yes, I had not gone that far. In fact, the ifdef(Thickness) test in 
#macro _Electric() is not necessary as Thickness must always be defined 
in the enveloping #macro Electric().

Thomas

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