Index: /issm/trunk/src/m/classes/public/mesh/meshyams.m
===================================================================
--- /issm/trunk/src/m/classes/public/mesh/meshyams.m	(revision 2566)
+++ /issm/trunk/src/m/classes/public/mesh/meshyams.m	(revision 2567)
@@ -53,4 +53,12 @@
 %load velocities 
 disp('loading velocities...');
+A=whos('-file',velocities);
+if length(A)==4,
+	intep='grid';
+elseif  length(A)==5,
+	interp='mesh';
+else
+	error(['meshyams error message: file ' velocities ' does not contain 4 (x,y,vx,vy) or 5 (x,y,index,vx,vy) variables']);
+end
 load(velocities);