diff --git a/+toppe/systemspecs.m b/+toppe/systemspecs.m
index ae864e1..0af4406 100644
--- a/+toppe/systemspecs.m
+++ b/+toppe/systemspecs.m
@@ -34,8 +34,8 @@
 
 % The following determine the slice/echo/view indexing in the data file
 sys.maxSlice = 2048;           % max dabslice. UI won't allow more than this to be entered
-sys.maxView  = 600;            % not sure what limit is here
-sys.maxEcho  = 16;             % determined empirically
+sys.maxView  = 600;
+sys.maxEcho  = 1;             % actual value seems to be 16, but we won't use this dimension so only allow 1 here
 
 
 %% Substitute specified system values
@@ -56,6 +56,12 @@
     otherwise, error('Gradient coil (%s) unkown', sys.gradient);
 end
 
+if sys.maxView > 2048
+    error('maxView exceeds max value (2048)');
+end
+if sys.maxEcho > 1
+    error('maxEcho exceeds max value (1)');
+end
 
 return