Handle error -1074396077

Hello

I am working on pattern recognition program. When I choose image type "Grayscale U8" everything works correctly and finds what I need.

But as soon as I change image type to "RGB U32" I get error message:

"Error -1074396077 occurred at IMAQ Learn Pattern 4  

Possible reason(s):

IMAQ Vision: Invalid image type.

"

and same goes for Match Pattern.

How can I make it work?

Thank you