Vcluster-Segmentation Fault

Hi
I am trying to run vcluster on a unix machine with a matrix size of 6834 x 9 (6834 instances and 9 features). I am getting a segmentation fault error when I run the following command:

-bash-3.2$ vcluster -rclassfile=Cafe_Conferences-and-Academic-Travel.rclass Cafe_Conferences-and-Academic-Travel.mat -showfeatures 10

I get the following error upon execution:

********************************************************************************
vcluster (CLUTO 2.1.1) Copyright 2001-03, Regents of the University of Minnesota

Matrix Information -----------------------------------------------------------
Name: Cafe_Conferences-and-Academic-Travel.mat, #Rows: 6834, #Columns: 9, #NonZeros: 61506

Options ----------------------------------------------------------------------
CLMethod=RB, CRfun=I2, SimFun=Cosine, #Clusters: 10
RowModel=None, ColModel=None, GrModel=SY-DIR, NNbrs=40
Colprune=1.00, EdgePrune=-1.00, VtxPrune=-1.00, MinComponent=5
CSType=Best, AggloFrom=0, AggloCRFun=I2, NTrials=10, NIter=10

Solution ---------------------------------------------------------------------

-------------------------------------------------------------------------------------
------------------------------------------------------------------------------------
Segmentation fault

I am able to get the cluster solution file but I can not get the entropy and the purity of each cluster due to this segmentation fault error. The vcluster runs perfectly with a smaller matrix holding 28 instances and 9 features giving me information on entropy and purity.

For example:
-bash-3.2$ vcluster -rclassfile=test1.rclass test1.mat 10
********************************************************************************
vcluster (CLUTO 2.1.1) Copyright 2001-03, Regents of the University of Minnesota

Matrix Information -----------------------------------------------------------
Name: test1.mat, #Rows: 28, #Columns: 9, #NonZeros: 252

Options ----------------------------------------------------------------------
CLMethod=RB, CRfun=I2, SimFun=Cosine, #Clusters: 10
RowModel=None, ColModel=None, GrModel=SY-DIR, NNbrs=40
Colprune=1.00, EdgePrune=-1.00, VtxPrune=-1.00, MinComponent=5
CSType=Best, AggloFrom=0, AggloCRFun=I2, NTrials=10, NIter=10

Solution ---------------------------------------------------------------------

--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
10-way clustering: [I2=2.80e+01] [28 of 28], Entropy: 0.365, Purity: 0.357
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
cid Size ISim ISdev ESim ESdev Entpy Purty | abuf anon Anon anon anon Arts beow bioe Bria Canu case Conj curl drdi dund Eagl Euro expa fara Fund gesu GoGo grad grup humm Indi
--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
0 4 +1.000 +0.000 +0.848 +0.000 0.425 0.250 | 0 0 0 1 0 0 0 0 0 0 0 0 0 1 0 0 1 0 0 0 0 0 0 0 0 1
1 2 +1.000 +0.000 +0.939 +0.001 0.213 0.500 | 0 0 0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 0 0 0 0 0

I don't need the class information, all I need is the entropy and purity information on my clusters. Is there any other way to find this information? I would really appreciate if I can get any insight on this issue.

Thanks,
Sangita