Index: trunk/psModules/src/imcombine/pmSubtractionMatch.c
===================================================================
--- trunk/psModules/src/imcombine/pmSubtractionMatch.c	(revision 33417)
+++ trunk/psModules/src/imcombine/pmSubtractionMatch.c	(revision 33424)
@@ -53,4 +53,5 @@
     fprintf(stderr, "    Memory in use: %zd\n", totalSize);
     fprintf(stderr, "    Largest block: %ld\n", largest);
+    //MEH -- osx may not like sbrk
     fprintf(stderr, "    sbrk(): %zd\n", (size_t)sbrk(0));
 #endif
@@ -122,5 +123,5 @@
         PS_ASSERT_FLOAT_LESS_THAN(sysError, 1.0, false);
     }
-    if (isfinite(sysError)) {
+    if (isfinite(skyError)) {
         PS_ASSERT_FLOAT_LARGER_THAN_OR_EQUAL(skyError, 0.0, false);
     }