LX Motor Drive Problem

[Paul Stenquist]

My LX Motor Drive will sometimes indicate that it's reached the end of
the roll long before it has actually done so. It seems this is due to
excessive tension in the film canister which fools the motor drive
rewind alert. Has anyone else had this problem? Is there an easy fix? Is
it more prevalent with one type of film. (I was shooting Kodak Portra
400VC today and had constant problems.)
Paul