[Insight-users] Deformable registration using BSplines example code--exception

[Siddharth Vikal]

Hello,

Did anyone try the example code of DeformableRegistration4 ? I was
trying it with example data RatLungSlice1, 2 as suggested in the ITK
software guide. I'm getting an exception as soon as StartRegistration
is called. It reads:

"The search direction is not a descent direction. IFlag = -1. Line
search failed. See documentation of routine MCSRCH; Error Return of
line search: Info = 0. Possible causes: Function or Gradient are
incorrect or incorrect tolerance"

Since, am using example code and example data, I cannot make out where
is it going wrong.

Can someone help please?

regards
siddharth