Hi murchak,
In your code it looks like the error bar is only created at the very end of execution (i.e. it is placed outside of the for loop, so the plot will only be created after everything in the for loop is done executing). You are trying to modify the properties of the plot in that other for loop before the plot is created. You should try modifying your code to modify the line colors after or while the plot is created. Something worth trying would be to use a sequence structure to make sure the the right for loop executes after the error bar is created.
Regards,
James D.
Applications Engineer
National Instruments
