Index: /issm/trunk-jpl/src/m/classes/autodiff.py
===================================================================
--- /issm/trunk-jpl/src/m/classes/autodiff.py	(revision 19970)
+++ /issm/trunk-jpl/src/m/classes/autodiff.py	(revision 19971)
@@ -6,4 +6,5 @@
 from checkfield import checkfield
 from WriteData import WriteData
+from MatlabFuncs import *
 
 class autodiff(object):
@@ -67,5 +68,5 @@
 		md = checkfield(md,'fieldname','autodiff.tbufsize','>=',524288)
 		md = checkfield(md,'fieldname','autodiff.gcTriggerRatio','>=',2.0)
-		md = checkfield(md,'fieldname','autodiff.gcTriggerMaxSize','>=',2000000)
+		md = checkfield(md,'fieldname','autodiff.gcTriggerMaxSize','>=',65536)
 
 		#Driver value: