it takes only the first"number"value and the small loop goes on and on

[laborarory]

i want to read every "number" value and compare it with the "numeric constant.but in the small loop it reads only the first value and then the loop goes on and on and the next value is not read.

[mikeporter]

If you repost you code in V6.0 format I'll be glad to look at it, but in the meantime, turn on execution highlighting and watch the loops execute. You should be able to see why the small loop's exit condition is never met.

Mike...

[Dennis_Knutson]

That's the expected behavior the way you've programmed it. A value outside of a while loop is read once and is not updated inside. If you're passing this value from a main VI, you've got an infinite as well as a subVI does not continuously get a new value from th main.