Vision Run-Time Evaluation Period

HI NI,

I have an application that uses NI Vision functions which require a Vision Run-Time license.  When I distribute this application to potential customers they should be able to run the application with the Vision Run-Time license in "evaluation mode" for 30 days, or at least that used to be the case.  Now, when my potential customers install and run the application they get an error message "Error -1074396157 occurred at an unidentified location Possible reason(s): IMAQ Vision:  Unlicensed copy of NI Vision."

Why will it not allow me to run in evaluation mode?

Thanks,

B