[Camino-users] ask for help on sfpeaks

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Hello, professors, I am using the code
      "sfpeaks -inputmodel sh -order 6 -density 100 -searchradius 1.0 < ${DSID}_QBall.Bdouble > ${DSID}_QBallPDs.Bdouble"
   to obtain _qballpds.bdouble file, though I can finally obtain this file, but it also gave me the warning below   
¡°WARNING: optimizers.PowellMinimiserException: Powell exceeding maximum iterations. ¡± What can I do with the warning, can I do something to solve the problem?
 
When I use -pdview inputmodel pds order to view the  generated _qballpds.bdouble, there was no warning, but When I go on to do the next step'track -inputmodel pds -seedfile $SEEDFILEROOT -outputroot ${DSID}_${SEEDFILEROOT}_QBall -outputtracts oogl < ${DSID}_QBallPDs.Bdouble', I couldn't obtain the oogl file, and give me a warning below:
"Exception in thread "main" class misc.LoggedException: Unrecognized input model pds "
My seedfile is obtain from using MRIcro to generate a randomly drawn on corpus callosum  roi.img on FA.img.
Thanks so much for your any help!
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