PID help - error message appearing before run

[Andy_K]

Hi

I am using Labview 2010 with a USB6008 logger to run a vi which controls air flow.

I have tried to encorporate PID control into the vi so the user enters the desired flow and the system automatically provides the correct current to the proportional solenoids to give the desired flow using values obtained from pressure sensors.

I now have an error message and don't know why.

Can anyone help, I'm still a novice so please keep answers fairly simple.

many thanks

Andy

[RavensFan]

Try reinstalling the toolkit that includes the PID.  I opened your VI on my PC and didn't see any broken arrow errors like you are seeing.

[Barp]

Also please verify if your license of LabVIEW PID and Fuzzy Logic Toolkit is active. To do that go to National Instruments folder on your OS and run the "License Manager" and verify under LabVIEW 2010 >> Toolkits you have the toolkit licensed.