Index: /issm/workshop/2012/Talks/13_IceBridge/Exp_Par/Greenland_solution.par
===================================================================
--- /issm/workshop/2012/Talks/13_IceBridge/Exp_Par/Greenland_solution.par	(revision 14153)
+++ /issm/workshop/2012/Talks/13_IceBridge/Exp_Par/Greenland_solution.par	(revision 14154)
@@ -5,4 +5,7 @@
 disp('   Loading SeaRISE data from NetCDF');
 ncdata='Data/Greenland_5km_dev1.2.nc';
+if ~exist(ncdata,'file'),
+	error('Download Greenland_5km_dev1.2.nc first on http://websrv.cs.umt.edu/isis/index.php/Present_Day_Greenland and put it in Data/');
+end
 x1    = ncread(ncdata,'x1');
 y1    = ncread(ncdata,'y1');
@@ -30,4 +33,7 @@
 %Reading IceBridge data for Jakobshavn
 disp('      reading IceBridge Jakobshavn bedrock');
+if ~exist('Data/Jakobshavn_2008_2011_Composite_XYZGrid.txt','file'),
+	error('Download Jakobshavn_2008_2011_Composite_XYZGrid.txt first on https://data.cresis.ku.edu/data/grids/ and put it in Data/');
+end
 fid  = fopen('Data/Jakobshavn_2008_2011_Composite_XYZGrid.txt');
 data = fscanf(fid,'%g,%g,%g,%g,%g',[5 266400])';
Index: /issm/workshop/2012/Talks/13_IceBridge/runme.m
===================================================================
--- /issm/workshop/2012/Talks/13_IceBridge/runme.m	(revision 14153)
+++ /issm/workshop/2012/Talks/13_IceBridge/runme.m	(revision 14154)
@@ -4,4 +4,7 @@
 %Location of SeaRISE dataset
 ncdata='./Data/Greenland_5km_dev1.2.nc';
+if ~exist(ncdata,'file'),
+	error('Download Greenland_5km_dev1.2.nc first on http://websrv.cs.umt.edu/isis/index.php/Present_Day_Greenland and put it in Data/');
+end
 
 if any(steps==1)