NCL abs error on Linux

We are running an ncl program on robin1 at ORNL (linux box).

It is complaining about every absolute value argument we have in the
code (the identical
code runs fine on NCAR machines).
e.g.,:

    diff13 = abs(var_avg_1_intp - doubletofloat(var_avg_3_intp))

    fatal:Argument type mismatch on argument (0) of (abs) can not coerce

Has anyone else run into a problem with either Linux and/or an ORNL machine
and 'abs' with NCL? Are we missing some library call?

Thanks -

Nan Rosenbloom

attached mail follows:

Problem appears on robin1.ccs.ornl.gov, a linux machine.

In /model1-model2/set_2.ncl:
------------------------------------
[...]
printVarSummary(var_avg_1_intp)
printVarSummary(var_avg_3_intp)
                diff13 = abs(var_avg_1_intp - doubletofloat(var_avg_3_intp))
                diff23 = abs(var_avg_2_intp - doubletofloat(var_avg_3_intp))
[...]

The output looks like this:
--------------------------------
restarting at set 2
Starting set2 ----------------------------------------
 Copyright (C) 1995-2006 - All Rights Reserved
 University Corporation for Atmospheric Research
 NCAR Command Language Version 4.2.0.a033
 The use of this software is governed by a License Agreement.
 See http://www.ncl.ucar.edu/ for more details.
(0) =========================================
(0) Starting: set_2.ncl
(0) Start Time: Mon Sep 10 14:03:07 EDT 2007
(0) =========================================
(0) Processing season DJF
(0) Processing variable TSA

Variable: var_avg_1_intp
Type: float
Total Size: 55296 bytes
            13824 values
Number of Dimensions: 2
Dimensions and sizes: [lat | 96] x [lon | 144]
Coordinates:
            lat: [-90..90]
            lon: [ 0..357.5]
Number Of Attributes: 6
  long_name : 2m air temperature
  units : K
  cell_method : time: mean
  missing_value : 1e+36
  _FillValue : 1e+36
  average_op_ncl : dim_avg over dimension: time

Variable: var_avg_3_intp
Type: double
Total Size: 110592 bytes
            13824 values
Number of Dimensions: 2
Dimensions and sizes: [lat | 96] x [lon | 144]
Coordinates:
            lat: [-90..90]
            lon: [ 0..357.5]
Number Of Attributes: 5
  missing_value : -999
  long_name : 2-meter air temperature
  units : K
  _FillValue : 1.000000015047466e+30
  season : 0
fatal:Argument type mismatch on argument (0) of (abs) can not coerce
fatal:Execute: Error occurred at or near line 883 in file
/spin/home/slevis/lnd_diag/code/model1-model2/set_2.ncl

EXIT lnd_diag-version:/spin/home/slevis/lnd_diag Mon Sep 10 14:03:08 EDT
2007

-- 
Samuel Levis - slevis_at_ucar.edu
Terrestrial Sciences Section
Division of Climate & Global Dynamics
Earth & Sun Systems Laboratory
National Center for Atmospheric Research
PO Box 3000, Boulder CO 80307-3000   <- use for mail
1850 Table Mesa Dr, Boulder CO 80305 <- for shipping
USA
tel 303 497-1627   fax -1695
http://www.cgd.ucar.edu/tss/
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Received on Mon Sep 10 2007 - 12:34:18 MDT