Richie

Thank you Neville, you were right, the driver could not cope with changing so much at the same time. To fix it I used a little bit of a hack, I deconfigured, set the width and height, reconfigured, deconfigured, set the offset, and then finally reconfigured. And that works. Thanks for your help QUOTE (Neville D @ Mar 11 2009, 08:39 PM)

Hello, firstly thanks in advance for your help, I have been struggling with this for the last few days and any help is greatly appreciated. I am using a Pixelink PLB742-F firewire camera with NI-IMAQdx. What I need is to control the ROI and size using mode 7 of the camera. So i started with the example 'Grab and Scalable Format.vi'. I also need to control the shutter of the camera. So I looked at 'Grab and Attributes Setup.vi' and I thought I had figured out how to change the shutter, while the camera is capturing. Please see the attached image and vi. It works sometimes when i decrease the shutter, but if i increase it, it gives a timeout error. Please help me as it it driving me slighlty crazy. Thanks again, Richie