while loop

[stopped flow]

I have a problem to do my experiment with the attached vi. I would like to do experiments with accumulation by using while loop and I would like to stop the experiment with the stop button when I guess the accumulation seems to be enough. But the stop button did not work and I had to do the experiment with the suggested number of accumulation.

Please let me know how to improve the attached vi.

Shinji

[Dennis_Knutson]

The only thing you attached is a pdf file - not a VI.

[DFGray]

As Dennis said, we really need the VI, but I have a few comments on the PDF.

1. I suspect the inner while loop is never exiting, which means your out while loop will never exit either.  This will cause your stop button to not work.
2. You need to wrap your call library nodes into subVIs with good icons so that their function is more obvious on the block diagram (would you call C subroutines A, B, and C, or would you give them good names?).
3. For the future, if you post a screen shot, the best format to use is PNG.  GIF is also acceptable, but can lead to color shifting, since GIFs only handle 256 colors.  JPG is OK, but leads to "fuzz" around edges and wires, and will be no smaller than PNG.  Please do not use a Word document, PDF, or BMP.