Index: /issm/trunk-jpl/src/m/mesh/triangle.m
===================================================================
--- /issm/trunk-jpl/src/m/mesh/triangle.m	(revision 21170)
+++ /issm/trunk-jpl/src/m/mesh/triangle.m	(revision 21171)
@@ -36,4 +36,9 @@
 
 area=resolution^2;
+
+%Check that file exist (this is a very very common mistake)
+if ~exist(domainname)
+	error(['file "' domainname '" not found']);
+end
 
 %Mesh using TriMesh
Index: /issm/trunk-jpl/src/m/mesh/triangle.py
===================================================================
--- /issm/trunk-jpl/src/m/mesh/triangle.py	(revision 21170)
+++ /issm/trunk-jpl/src/m/mesh/triangle.py	(revision 21171)
@@ -43,4 +43,8 @@
 	area = resolution**2
 
+	#Check that file exist (this is a very very common mistake)
+	if not os.path.exists(domainfile):
+		raise IOError("file '%s' not found" % domainfile)
+
 	#Mesh using TriMesh
 	md.mesh=mesh2d()