vertical cross section problem

Hi all, I have a problem in plotting the vertical cross section for U wind. ******** the error is ;  Variable: level Type: float Total Size: 44 bytes             11 values Number of Dimensions: 1 Dimensions and sizes:    [level | 11] Coordinates:             level: [1000..100] Number Of Attributes: 3   long_name :    Height_Index   units :    level   actual_range :    ( 1050,  0 ) (0)    1000 (1)    925 (2)    850 (3)    700 (4)    500 (5)    400 (6)    300 (7)    250 (8)    200 (9)    150 (10)    100 (0)    gsn_csm_pres_hgt: Fatal: The coordinate array for the first dimension of the input data must be in Pascals, Hecto-pascals, or millibars (0)    and it must contain the attribute 'units' set to one of the following strings (depending on your units): (0)        'mb' 'Mb' 'MB' 'millibar' 'millibars' 'MILLIBARS' 'hybrid_sigma_pressure' 'Pa' 'pa' 'PA' 'Pascals' 'pascals' 'PASCALS' 'hpa' 'hPa' 'HPA' 'hecto-pascals' 'HECTO-PASCALS' (0)    Cannot create plot. fatal:Illegal right-hand side type for assignment fatal:Execute: Error occurred at or near line 104 in file U_cross_section_test_10yr.ncl ******and the ncdump for the file is ; netcdfATMc-monthlyAVG { dimensions:     lon = 158 ;     lat = 138 ;     level = 11 ;     time = UNLIMITED ; // (119 currently) variables:     float lon(lon) ;         lon:long_name = "Longitude" ;         lon:units = "degrees_east" ;         lon:actual_range = -18.04229f, 58.50375f ;     float lat(lat) ;         lat:long_name = "Latitude" ;         lat:units = "degrees_north" ;         lat:actual_range = -7.783508f, 52.90308f ;     float level(level) ;         level:long_name = "Height_Index" ;         level:units = "level" ;         level:actual_range = 1050.f, 0.f ;     double time(time) ;         time:long_name = "Time" ;         time:units = "hours since 1900-1-1 00:00:0.0" ;         time:actual_range = 841848., 928056. ;     float U(time, level, lat, lon) ;         U:long_name = "Zonal Wind" ;         U:units = "m/s" ;         U:missing_value = -1.e+30f ;     float V(time, level, lat, lon) ;         V:long_name = "Meridional Wind" ;         V:units = "m/s" ;         V:missing_value = -1.e+30f ;     float W(time, level, lat, lon) ;         W:long_name = "Vertical Velocity" ;         W:units = "m/s" ;         W:missing_value = -1.e+30f ;     float TK(time, level, lat, lon) ;         TK:long_name = "Temperature" ;         TK:units = "K" ;         TK:missing_value = -1.e+30f ;     float QD(time, level, lat, lon) ;         QD:long_name = "Mixing Ratio" ;         QD:units = "kg/kg" ;         QD:missing_value = -1.e+30f ;     float QC(time, level, lat, lon) ;         QC:long_name = "Cloud Mixing Ratio" ;         QC:units = "kg/kg" ;         QC:missing_value = -1.e+30f ;     float RH(time, level, lat, lon) ;         RH:long_name = "Relative Humidity" ;         RH:units = "fraction" ;         RH:missing_value = -1.e+30f ;     float HGT(time, level, lat, lon) ;         HGT:long_name = "Geopotential Height" ;         HGT:units = "m" ;         HGT:missing_value = -1.e+30f ;     float TH(time, level, lat, lon) ;         TH:long_name = "Potential Temperature" ;         TH:units = "K" ;         TH:missing_value = -1.e+30f ;     float TD(time, level, lat, lon) ;         TD:long_name = "Dew Point Temperature" ;         TD:units = "K" ;         TD:missing_value = -1.e+30f ;     float VOR(time, level, lat, lon) ;         VOR:long_name = "Horz Vorticity" ;         VOR:units = "1/s" ;         VOR:missing_value = -1.e+30f ;     float DIV(time, level, lat, lon) ;         DIV:long_name = "Horz Divergence" ;         DIV:units = "1/s" ;         DIV:missing_value = -1.e+30f ;     float MSE(time, level, lat, lon) ;         MSE:long_name = "Moist Static Energy" ;         MSE:units = "m2/s2" ;         MSE:missing_value = -1.e+30f ;     float PS(time, lat, lon) ;         PS:long_name = "Surface Pressure" ;         PS:units = "hPa" ;         PS:missing_value = -1.e+30f ;     float RT(time, lat, lon) ;         RT:long_name = "Total Precip" ;         RT:units = "mm/day" ;         RT:missing_value = -1.e+30f ;     float TGRND(time, lat, lon) ;         TGRND:long_name = "Ground Temperature" ;         TGRND:units = "K" ;         TGRND:missing_value = -1.e+30f ;     float SMT(time, lat, lon) ;         SMT:long_name = "Total Soil Water" ;         SMT:units = "mm" ;         SMT:missing_value = -1.e+30f ;     float BS(time, lat, lon) ;         BS:long_name = "Base Flow" ;         BS:units = "mm/day" ;         BS:missing_value = -1.e+30f ;     float SLP1(time, lat, lon) ;         SLP1:long_name = "Sea Level Pressure" ;         SLP1:units = "hPa" ;         SLP1:missing_value = -1.e+30f ;     float SLP2(time, lat, lon) ;         SLP2:long_name = "Sea Level Pressure" ;         SLP2:units = "hPa" ;         SLP2:missing_value = -1.e+30f ; // global attributes:         :domxmin = -18.04229f ;         :domxmax = 58.50375f ;         :domymin = -7.783508f ;         :domymax = 52.90308f ;         :domzmin = 1050.f ;         :domzmax = 0.f ; } so is there any thing cal help? THANKS Mohamed Ibrahim El-Sayed OMAR Egyptian Meteorological Authority Scientific Research Department Climate Studies Centre Kobry El-Quobba, P.O.Box. 11784 Cairo, EGYPT Mobil phone  : 002 0160802805  Home Phone : 002 0482370261

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