Arena: Animating NG via variable

[arena_noob]

I am using the pickup module to allow one entity to move other entities around a series of routes.

How can I dynamically display the number of grouped entities in the animation? Is there a way using a variable with NG?

[ewilliams]

Define a variable of type Real (versus String). At the appropriate point, use an Assign module (Basic Process template) to assign the variable equal to NG(group). Display that variable on the animation screen (use the little blue box with an X in it on the animation toolbars); the animation will refresh every time the Assign module updates the value of the variable.