E>
   yes? USE climatological_axes
   yes? LET v = L[GT=month_irreg]   ! variable with an irregular axis 
   yes? SAVE/FILE=bnds.nc/L=1:4 v   ! bounds attribute on time axis.
   </PRE>
<P>Note that we no longer need to use the qualifiers /RIGID /LLIMITS= 
to write a file with an irregularly-spaced time axis.  We will be able to append more 
time steps to the file and keep the correct point spacing.
<PRE>
   yes? SAVE/APPEND/FILE=bnds.nc/L=5:6 v 
</PRE>
<P>If there is a gap between time steps in the file and