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<H2><A NAME="SECTION00333000000000000000">
1.3.3 Standard error (<I>stderr</I>)</A>
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<A NAME="194"></A>
<A NAME="195"></A>
<P>
Most <I>UNIX</I> and <A NAME="tex2html65"
HREF="http://www.soest.hawaii.edu/gmt"><B>GMT</B></A> programs will on occasion write error messages.
These are typically written to a separate data stream called
<I>stderr</I> and can be redirected separately from the standard
output (which goes to <I>stdout</I>). To redirect error messages
we use
<P>
<PRE>
UNIXprogram >& errors.log
</PRE>
<P>
When we want to save both program output and error messages to
separate files we use the following syntax:
<BR>
<P>
<PRE>
(GMTprogram > output.d) >& errors.log
</PRE>
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<BR><HR>
<ADDRESS>
Paul Wessel
2001-04-18
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