Dimension Error: What does it mean???

[Mald MM5]

Hi there,

I am trying to generate a time-series plot at a single point from a WRF
output file. The grid dimensins are X,Y=112  points and Z is 32 levels.
After opening the file, "q dims" gives the following.

ga-> q dims
Default file number is: 1
X is varying Lon = 73.465 to 73.7092 X = 1.00002 to 112.001
Y is varying Lat = 1.76 to 2.0042 Y = 1.00002 to 112

Z is fixed Lev = 0.01 Z = 1

T is fixed Time = 18Z11JAN2006 T = 1

Then I set the environment to a single point. Now the "q dims" give:

ga-> q dims
Default file number is: 1
X is fixed Lon = 73.542 X = 36.0016
Y is fixed Lat = 1.8964 Y = 63
Z is fixed Lev = 0.015 Z = 2
T is varying Time = 18Z11JAN2006 to 18Z12JAN2006 T = 1 to 25

Then I issued the command to get the vertical velocity time series as "d w"
and it gives:

ga-> d w
Data Request Error: Invalid grid coordinates
  World coordinates convert to non-integer grid coordinates
  Variable = w Dimension = 0
  Error ocurred at column 1
DISPLAY error: Invalid expression
  Expression = w

Variable w is present in when I do a "q file" and I can plot the w field on
an XY plane for any time, which means no problem with the field.

I had the same done for my coarser grid with no probelm where the coarser
grid had 90x90 points. What does this error means and how do I fix this

Thank you
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