Addition of 2D array

[Angelia]

I need to sum up the output from a detector continuous which takes the form of 2D array. I was trying to do so by using polymorphism and shift register. However, when I put an indicator at the outlet of the addition, no output is given. Why would this happen I have the file attached, and the addition happens in frame one of the outer sequence structure.

Thanks!

Angelia

[Angelia]

Actually I realize I only need to initialize the shift register.

[Samuel_S]

Angelia,

I was actually just looking at your code  I'm glad you caught it too!