One or more of the values of parameter rejflags is not
recognized by the task implementation, even though permitted by the
interface. This should not occur.
Some portion of a node does not lie entirely within the boundaries
of the combined exposure map. This need only concern users of the
combined exposure map. In particular, note that the tasks to
generate spectra, lightcurves and response matrices do not use
the combined exposure map. However, the default boundaries are
ample enough that this situation should not occur, and may indicate
some other problem.
corrective action: The combined exposure map is truncated at its boundaries, which are set by task rgsangles.