I see whispers of this error on the web, but no real information, so I realize this may be a 'long-shot' post.
I am using Adaptive Wide Angle in order to straighten some edges of some artwork photos. I am using the 'fisheye' correction. More often than not, I draw the line to use as my 'basis' and then when I drag the center point to have the curve match the one in the photo I receive this error message:
"Failed to Calibrate. You may need to adjust the constraint more precisely or try another constraint."
I have tried this on both 32 and 64 bit. I will say that it will work in some areas of the same photo, but not at the critical points where I truly need it. I have no idea what is lacking during the calibration, so I'm unsure what to adjust. Since my corrections are usually on the edge, I thought that may be the issue, but I added some whitespace around the photo and still get this error.