[ncl-talk] Error in extracting dates when certain conditions are met

[Lyndz]

Dear NCL-experts,

I am extracting the dates when the zero contour lines of two variables are
both within a region.

Attached is the script and sample data file.

[*PROBLEM*]
There are* four* time steps that satisfy the conditions but only *three*
are printed in the output file.

I also encounter the following warning:

warning:Argument 0 of the current function or procedure was coerced to the
appropriate type and thus will not change if the function or procedure
modifies its value


I'm not sure what is causing this for the first time step.

The expected output is:

*(0) 2017-01-16-00 *

*(1) 2017-01-16-06*

*(2) 2017-01-16-12*

*(3) 2017-01-16-18*

I'll appreciate any help on this.

Sincerely,
Lyndz
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