Index: trunk/psModules/src/imcombine/pmSubtraction.c
===================================================================
--- trunk/psModules/src/imcombine/pmSubtraction.c	(revision 30737)
+++ trunk/psModules/src/imcombine/pmSubtraction.c	(revision 30738)
@@ -939,4 +939,14 @@
     // which are significantly deviant from that distribution.
 
+    // if we only have 3 or fewer stars, we have to accept them all
+    if (match->nGood < 3) {
+	kernels->mean = NAN;
+	kernels->rms = NAN;
+	kernels->numStamps = match->nGood;
+	
+	psLogMsg("psModules.imcombine", PS_LOG_INFO, "only %d stars, keeping them all (good luck!)",  kernels->numStamps);
+	return 0;
+    }
+
     kernels->mean = NAN;
     kernels->rms = NAN;