Index: trunk/psModules/src/astrom/pmAstrometryDistortion.c
===================================================================
--- trunk/psModules/src/astrom/pmAstrometryDistortion.c	(revision 41533)
+++ trunk/psModules/src/astrom/pmAstrometryDistortion.c	(revision 41810)
@@ -347,5 +347,5 @@
     // as of r40806, psPlaneTransformInvert supplies the extra order (if non-linear)
     psFree (fpa->fromTPA);
-    fpa->fromTPA = psPlaneTransformInvert(NULL, fpa->toTPA, *region, 50, 4);
+    fpa->fromTPA = psPlaneTransformInvert(NULL, fpa->toTPA, *region, 100, 6);
     psFree (region);