DSS Example SkewT

Hello all
I am trying to use the script about the DSS Example SkewT ,I downloaded the
data *netcdf.gdas.2012071100.nc* and run the script using the same command
illustrated in the script

*ncl 'ncfile="netcdf.gdas.2012071100.nc"' 'station_icao="KDNR"'
'station_synop="72469"' skewt_station.ncl*

and I got the following error

*fatal:And: Dimension size, for dimension number 0, of operands does not
match, can't continue
fatal:["Execute.c":7556]:Execute: Error occurred at or near line 716 in
file $NCARG_ROOT/lib/ncarg/nclscripts/csm/skewt_func.ncl
fatal:["Execute.c":7556]:Execute: Error occurred at or near line 2168 in
file $NCARG_ROOT/lib/ncarg/nclscripts/csm/skewt_func.ncl
fatal:["Execute.c":7556]:Execute: Error occurred at or near line 135 in
file skewt_station.ncl*

The error is in the function *skewt_data = skewT_PlotData(wks, skewt_bkgd,
p,tc,tdc,z, wspd,wdir, dataOpts)*
I cannot find exactly what is wrong with the function.
I have attached the script.
I am using NCL 6.1.0-beta

thanks in advance .

-- 
===============
Ahmed Lasheen
Junior researcher at Cairo Numerical Weather Prediction Center (CNWPC)
Egyptian Meteorological Authority(EMA)
Cairo,Egypt
===============

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