ga-> skew.gs 
No hardcopy metafile open
All files closed; all defined objects released;
All GrADS attributes have been reinitialized
Notice: Implied interpolation for file 20120911_d03.ctl
 Interpolation will be performed on any data displayed from this file
Initial Time is 12Z10SEP2012
Create gif images as well (1=yes ; 0=no)
0
Please enter coordinated for sounding
 
Latitude values between: 28.3707 and 32.1004
Enter Latitude
30
 
Longitude values between: 76.226 and 81.0233
Enter Longitude
78
 
Overlay two time periods 1=yes ; 0=no
5
 
Please enter time to plot
Available times: 1 to 15
5
Drawing temperature sounding.
Drawing dewpoint sounding.
Notice:  Automatic Grid Interpolation Taking Place
Printing Grid -- 1 Values -- Undef = -9.99e+08
-9.99e+08 

1000
getrh
33.3361

1000
0.0336465090955271
Non-numeric args to numeric operation
  Error occurred on line 2176
  In file skew.gs
  Error occurred on line 2432
  In file skew.gs
  Error occurred on line 1109
  In file skew.gs
  Error occurred on line 69
  In file skew.gs