Index: mttroot/mtt/bin/trans/obs_r2m
==================================================================
--- mttroot/mtt/bin/trans/obs_r2m
+++ mttroot/mtt/bin/trans/obs_r2m
@@ -44,11 +44,11 @@
 OFF Nat;
 
 ON NERO;        % Suppress zero elements
 
 mtt_matrix := MTTYY;
-mtt_matrix_n := MTTNY*MTTGPCNy;
+mtt_matrix_n := MTTNY*(MTTGPCNy+1);
 mtt_matrix_m := 1;
 mtt_matrix_name := Y;
 in"$MTTPATH/trans/matlab_matrix.r";
 
 OUT "$1_obs.m1";