why the printer does't print my first requested printing task?

[fenny]

I 'm using web printer to print my result(graphs), I used a loop to run the program 5 times, but whenever I run the program, my first printing request is not carried out by the printer. It seemd that the printer did not respond to my first request. So I have to re-run the program one more time to get that missed "printing". and now it works. I don't know what is the real cause of this.

[Jeremy Braden]

You should make sure that there is data going to the printer. If you are using report generation, create an html file so that you can see it in the webbrowser. If you are using another method, put an indicator on the data before it goes to the printer. You might also see if running your code in highlight execution mode helps to islolate the error. This way you can isolate whether there is a problem with you printer or if there is a problem in the VI.