Suppose you have a potential variable "TimeOut" that does not yet have a value. the line:
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If>{%TimeOut%="TimeOut"}
You could simply pre-set "TimeOut" (Let>TimeOut=) and the situation would be resolved. So the solution is very simple. But one of the great things about Macro Scheduler is that there is no requirement to predefine variables.
The code I was actually trying to use is:
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If>{(%TimeOut%="TimeOut")or(%TimeOut%=0)}
Let>TimeOut=99999999999999
EndIf
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Let>TimeOut=
//
//
//Lots of other code
//
//
If>{(%TimeOut%="")or(%TimeOut%=0)}
Let>TimeOut=99999999999999
EndIf
Dick