It helps if you use the same name as the variable in the action to set the value of the variable. In your sample the variable is named Limit and your action tries to set a value of something named v_ReportLimit. If you change v_ReportLimit to Limit it will work.
Yeah that's right , But my requirement is i don't want to use extra button to clear .Need to achieve it from the input box itself by giving clear option(Tool option)
As long as your document has any data (your sample doesn't) you can use the OnAnySelect trigger. Add a Set Variable action to that trigger with Limit as the name of the variable and use as value: =if(len(GetCurrentSelections())=0, 100000,Limit)
