R help - Nov 2009 - Error with strucchange/breakpoints

Hi, 

I am trying to a strucutural change analysis on a certain data set. Attached
here, with variable name "xcd"
http://old.nabble.com/file/p26226190/xcd.rda xcd.rda 

Am using the following command:
bp.inrz<-breakpoints(INR~SPX+WPI,data=xcd,h=26)

But keep on getting this error whatever variables i put in on the x side as
regressors:

Error in chol2inv(qr.R(qr(X))) : 
  element (3, 3) is zero, so the inverse cannot be computed

Any insights ??

Regards
Anmol

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