Single camera to use two times with different exposure

Dear Team,

I am using single camera two times with different exposure value in my VBAI program.

Sometime I am getting an image that has been acquired prior to the exposure time change.

So. could you please suggest how to overcome this issue.

Because in my program I am facing this issue and some time there are 2-3 % of these prior images.

Thanks and Regards,

JN