As usual, it would be helpful if you shared some information with the people you ask for assistence.
In this case the important facts are e.g.:
Which camera is used?
Which file format is used for saving the captured frames?
Automatic detection of the bayer/mosaic pattern of an OSC camera is possible only when the pattern is stored in the file. This is e.g. the case with DSLR cameras if the proprietary raw format (CR2 for Canon camera, NEF for Nikon camera, etc.) is used. In other cases you have to select the correct bayer/mosaic pattern in the Debayer process window. The correct bayer/mosaic pattern can be found out from the manufacturer of the camera.
So the message that you encountered is presumably user error due to incomplete input data, it is not an error due to software deficiency
Bernd