is.

   13) If any input string pointer is null, the error SPICE(NULLPOINTER)
       will be signaled.
 
   14) If any input string has length zero, the error SPICE(EMPTYSTRING)
       will be signaled.

   15) If the DSK segment's coordinate system is not latitudinal
       (aka planetocentric), the error SPICE(BADCOORDSYSTEM) is signaled.
</PRE>
<h4><a name="Files">Files</a></h4>
<PRE>
 
   Appropriate DSK, SPK, PCK, and frame data must be available to
   the calling program before this routine is called.