100	wrong version number in lowesd.  Probably typo in caller.
101	d>dMAX in ehg131.  Need to recompile with increased dimensions.
102	liv too small.   (Discovered by lowesd)
103	lv too small.    (Discovered by lowesd)
104	alpha too small.  fewer data values than degrees of freedom.
105	k>d2MAX in ehg136.  Need to recompile with increased dimensions.
106	lwork too small
107	invalid value for kernel
108	invalid value for ideg
109	lowstt only applies when kernel=1.
110	not enough extra workspace for robustness calculation
120	zero-width neighborhood. make alpha bigger
121	all data on boundary of neighborhood. make alpha bigger
122	extrapolation not allowed with blending
123	ihat=1 (diag L) in l2fit only makes sense if z=x (eval=data).
171	lowesd must be called first.
172	lowesf must not come between lowesb and lowese, lowesr, or lowesl.
173	lowesb must come before lowese, lowesr, or lowesl.
174	lowesb need not be called twice.
175	need setLf=.true. for lowesl.
180	nv>nvmax in cpvert.
181	nt>20 in eval.
182	svddc failed in l2fit.
183	didnt find edge in vleaf.
184	zero-width cell found in vleaf.
185	trouble descending to leaf in vleaf.
186	insufficient workspace for lowesf.
187	insufficient stack space
188	lv too small for computing explicit L
191	computed trace L was negative; something is wrong!
192	computed delta was negative; something is wrong!
193	workspace in loread appears to be corrupted
194	trouble in l2fit/l2tr
195	only constant, linear, or quadratic local models allowed
196	degree must be at least 1 for vertex influence matrix
999	not yet implemented
