Do I need to change Imaq Create VI or related VIs for a 1394a firewire camera?

I have a program to acquire images from a Zeiss axiocam MR2 that has a PCI framegrabber. Now I am trying to acquire images from one of their firewire cameras using the same program (while swapping the dll functions calls specific for the firewire camera) and it crashes every time I try to acquire an image, even while debugging in steps. Is there something intrinsically different with the firewire camera that I need to do differently? I create a 10 frame buffer with IMAQ create, set a ROI in the firewire camera (works no problem), create a pointer to the buffer, and then put the image into the buffer. No problems with the camera containing a framegrabber but the firewire camera crashes every time on acquisiton. Any ideas? Thanks

Ok. I can see that a firewire camera that doesn't conform to the DCAM spec won't work with the IMAQdx driver so I can't take that approach.
What I still am not understanding is why I can't create a buffer using IMAQ create that I can then place images into using the acquisition function supplied by Zeiss. It seems in the example below that in the case where IMAQdx is used to store images in a buffer using IMAQ create.
Then can you tell me why I can't use the following (or similar) code to snap images to the Image buffer or even a 1D array so long as I have a pointer, proper sized array to put the image data, and the array size?
Thanks for your patience while I try to wrap my head around this

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Do I need to change Imaq Create VI or related VIs for a 1394a firewire camera?

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