Just an idea about that tracer :
If you have access to the code of your indi, go to metaeditor, place breakpoint at a point you are certain to encounter, no matter what (if you don't know, place it at first line in onCalculate) and don't forget to set the options to nzdcad (since it seems to be the problem), and there you go.
Run your code step by step using spies on your variables The joy of running after bugs
Good luck and good rest for the week end
If you have access to the code of your indi, go to metaeditor, place breakpoint at a point you are certain to encounter, no matter what (if you don't know, place it at first line in onCalculate) and don't forget to set the options to nzdcad (since it seems to be the problem), and there you go.
Run your code step by step using spies on your variables The joy of running after bugs
Good luck and good rest for the week end