sorry, I am still not clear now.
I think there are at least two VIs when the read conflict occures.
Each VI has VISA Configure Serial Port 、VISA Read and VISA Close .
After the first VI ran using the com1, if the second VI runs and still using the com1, the second VI should appear error.
Thanks you very much. Sorry for my poor expression.
Message Edité par TiTou le 07-14-2006 09:18 AM
I agree with TiTou, if you dont actually close the Port after opening it any Vi that attempts to initalise/contact the port will get an error.
If the instruments are all on seperate ports you could make the port/Visa resource default for each one.