Sajen -
Is there any way you could post the VI so that I could see the error first-hand? My first thought is that your VI somehow got corrupted, and if that's the case, there will unforunately be little chance to recover it. I assume it was opening okay before; do you recall what changes you made to it between that time and the time it stopped opening?
Eric S.
Applications Engineer
National Instruments
E. Sulzer
Applications Engineer
National Instruments