I also had this error executing autopano from hugin, looking at the log, but I received a message from Hugin saying the I had to define some matching points between the 2 images.
I defined them, and it was working.
So this error is due to a bad use of autopano.
And about the default value in hugin, I'm waiting for the debian package of final 0.7.0 to make the 'Ubuntu' version of it (renaming autopano-SIFT by default).
I also had this error executing autopano from hugin, looking at the log, but I received a message from Hugin saying the I had to define some matching points between the 2 images.
I defined them, and it was working.
So this error is due to a bad use of autopano.
And about the default value in hugin, I'm waiting for the debian package of final 0.7.0 to make the 'Ubuntu' version of it (renaming autopano-SIFT by default).