Did you use warps generated with other software? If so, an erroneously interpreted out-of-bounds value might be causing this. Have a look here, in particular, you might need to set the -marker option to warpcorrect.
Did you use warps generated with other software? If so, an erroneously interpreted out-of-bounds value might be causing this. Have a look here, in particular, you might need to set the -marker option to warpcorrect.