Index: /issm/trunk-jpl/test/NightlyRun/runme.m
===================================================================
--- /issm/trunk-jpl/test/NightlyRun/runme.m	(revision 19594)
+++ /issm/trunk-jpl/test/NightlyRun/runme.m	(revision 19595)
@@ -220,5 +220,5 @@
 
 					%disp test result
-					if (error_diff>tolerance);
+					if (error_diff>tolerance | isnan(error_diff));
 						disp(sprintf(['ERROR   difference: %-7.2g > %7.2g test id: %i test name: %s field: %s'],...
 							error_diff,tolerance,id,id_string,fieldname));
Index: /issm/trunk-jpl/test/NightlyRun/runme.py
===================================================================
--- /issm/trunk-jpl/test/NightlyRun/runme.py	(revision 19594)
+++ /issm/trunk-jpl/test/NightlyRun/runme.py	(revision 19595)
@@ -192,5 +192,5 @@
 
 						#disp test result
-						if (numpy.any(error_diff>tolerance)):
+						if (numpy.any(error_diff>tolerance) or numpy.isnan(error_diff)):
 							print 'ERROR   difference: %-7.2g > %7.2g test id: %i test name: %s field: %s' % \
 								(error_diff,tolerance,id,id_string,fieldname)