imaq1394 and vision 7.1 VB Bug

[Ferko]

After upgrading to version 7.1 of Imaq Vision, the DrawPatternMatch does not work anymore. The rectangle is drawn, but instantly disappears upon the first call to the function imaq1394Grab2CW
I am using NI Imaq for 1394 (version 2.01), VB 6.0. This feature worked fine until I upgraded to Vision 7.1. I need URGENT help!

[gregstoll]

Ferko -

DrawPatternMatch draws the rectangle and the crosshair on the overlay of the image.  If you then acquire a new image, that image will not have an overlay.  If you want to copy the overlay from the old image to the new image, you can use the CWIMAQOverlay.CopyTo method.  For example:

OldImage.Overlays(1).CopyTo NewImage.Overlays(1)

Hope this helps - if not, let me know.

Greg Stoll
Vision R&D
National Instruments