Index: /issm/trunk-jpl/src/m/classes/pairoptions.m
===================================================================
--- /issm/trunk-jpl/src/m/classes/pairoptions.m	(revision 15330)
+++ /issm/trunk-jpl/src/m/classes/pairoptions.m	(revision 15331)
@@ -33,5 +33,5 @@
 			%check length of input
 			if mod((nargin-1),2),
-				error('error: an even number of options is required') 
+				error('Invalid parameter/value pair arguments') 
 			end
 			numoptions = (nargin-1)/2;
Index: /issm/trunk-jpl/src/m/classes/pairoptions.py
===================================================================
--- /issm/trunk-jpl/src/m/classes/pairoptions.py	(revision 15330)
+++ /issm/trunk-jpl/src/m/classes/pairoptions.py	(revision 15331)
@@ -46,5 +46,5 @@
 		#check length of input
 		if len(arg) % 2:
-			raise TypeError('error: an even number of options is required') 
+			raise TypeError('Invalid parameter/value pair arguments') 
 		numoptions = len(arg)/2
 
Index: /issm/trunk-jpl/src/m/classes/plotoptions.m
===================================================================
--- /issm/trunk-jpl/src/m/classes/plotoptions.m	(revision 15330)
+++ /issm/trunk-jpl/src/m/classes/plotoptions.m	(revision 15331)
@@ -45,5 +45,5 @@
 			 %check length of input
 			 if mod((nargin-1),2),
-				 error('buildlist error message: an even number of plotoptions is required')
+				 error('Invalid parameter/value pair arguments')
 			 end
 
Index: /issm/trunk-jpl/src/m/classes/plotoptions.py
===================================================================
--- /issm/trunk-jpl/src/m/classes/plotoptions.py	(revision 15330)
+++ /issm/trunk-jpl/src/m/classes/plotoptions.py	(revision 15331)
@@ -38,5 +38,5 @@
 		#check length of input
 		if len(arg) % 2:
-			raise TypeError('error: an even number of options is required')
+			raise TypeError('Invalid parameter/value pair arguments')
 
 		#go through args and build list (like pairoptions)