conditional expession yeilds a missing value

Hello ncl-talk
My model domain has 66 grid boxes in the N-S (j) direction. I can do a
vertical cross section in ncl with boxes 0 to 34 and 52 to 66 but not
35 to 51. The 35 to 51 range includes the 5 N latitude line that I
need.

I get the error below no matter what wrfout file varible I use:
(0) Working on time: 2006-05-25_00:00:00
fatal:The result of the conditional expression yields a missing value.
NCL can not determine branch, see ismissing function
fatal:Execute: Error occurred at or near line 104 in file
vert_xsec_latitudinal_o3_5N.ncl

Has anyone run into the error above and how did you solve it?

Thanks

Jonathan Wynn Smith

Doctoral Student in Howard University
Program in Atmospheric Sciences (HUPAS)
2008 ASP Graduate Student Visitor
2006 ASP Summer Colloquium Participant

408 Thirkield Building
2355 6th St. NW
Washington, DC 20059

E-mail: jw_smith@howard.edu or jwsmith9@gmail.com
Cell Phone: 336-601-4563

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Received on Thu Jan 7 10:57:24 2010