Producer/ Consumer Design error?

[Relient]

I am learning labview as I go and little errors keep stumping me. I set up the producer/consumer design and it reads the two while loops like I want. However, when I stop the program to save it to the write to measure it gives me an error saying invalid input and highlights the dequeue. I have to queues running (one for a button and one for data) and they both do this. I tried connecting it different ways but its always the same error. Any ideas? 

[dkfire]

Dublicate post

Stick to one post at a time. Do not post the same question on two different threads.