How can i know if an IMAQdx session is open or not?

I, me again. :smileyvery-happy:

I would like toknow if there isa wayto knowif an IMAQdx sessionis already openor not.I made asubVIthatmanages theimaging partof amore complex software.My problemis simple:I need to openand closethe IMAQdx session.If I do thisevery timemyVIis called i get a delay ofa few secondsand I do notreally like this.SoI thought thatI could openthe sessionthe first timethat myVIis called,use itwith the sessionalready openthe other times,and close it whenthe main programrequires it,perhaps through aboolean flag.

Thank you,

Francesco.