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Re: Locate an underflow [message #25131 is a reply to message #25127]

Tue, 22 May 2001 15:05

m.hadfield
Messages: 36
Registered: April 2001

Member

From: "Francesco" <francesco.spada@jrc.it>
> I've got this error
>
> % Program caused arithmetic error: Floating underflow
>
> Is it possible to know where it appens without putting a million of
> stop or breakpoint in my program?

Set the !EXCEPT system variable to 2.

From IDL 5.4 documentation:

!EXCEPT

An integer variable that controls when IDL checks for invalid
mathematical computations (exceptions), such as division by zero.
The three allowed values are:

Value Description

0 Never report exceptions.

1 Report exceptions when the interpreter is returning to an
interactive prompt (the default).

2 Report exceptions at the end of each IDL statement. Note that
this slows IDL by roughly 5% compared to setting !EXCEPT=1.

For more information on invalid mathematical computations and
error reporting, see Math Errors. The value of !EXCEPT is used by
the CHECK_MATH function to determine when to return errors. See
CHECK_MATH for details.

---
Mark Hadfield
m.hadfield@niwa.cri.nz http://katipo.niwa.cri.nz/~hadfield
National Institute for Water and Atmospheric Research

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[Message index]

		Re: Locate an underflow By: Ken Mankoff on Tue, 22 May 2001 19:58
		Re: Locate an underflow By: m.hadfield on Tue, 22 May 2001 15:05
		Re: Locate an underflow By: thompson on Wed, 23 May 2001 08:08

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