diff --git a/matlab/dynare_identification.m b/matlab/dynare_identification.m
index 1e96f8b72..1547604cf 100644
--- a/matlab/dynare_identification.m
+++ b/matlab/dynare_identification.m
@@ -207,15 +207,23 @@ else
     name_tex = [cellstr(M_.exo_names_tex); cellstr(M_.param_names_tex)];
 end
 
+skipline()
+disp(['==== Identification analysis ====' ]),
+skipline()
+if nparam<2,
+    options_ident.advanced=0;
+    advanced = options_ident.advanced;
+    disp('There is only one parameter to study for identitification.')
+    disp('The advanced option is re-set to 0.')
+    skipline()
+end
+
 options_ident = set_default_option(options_ident,'max_dim_cova_group',min([2,nparam-1]));
 options_ident.max_dim_cova_group = min([options_ident.max_dim_cova_group,nparam-1]);
 
 
 MaxNumberOfBytes=options_.MaxNumberOfBytes;
 store_options_ident = options_ident;
-skipline()
-disp(['==== Identification analysis ====' ]),
-skipline()
 
 if iload <=0,
     
diff --git a/matlab/identification_analysis.m b/matlab/identification_analysis.m
index 07f5ce50f..c30ed8a19 100644
--- a/matlab/identification_analysis.m
+++ b/matlab/identification_analysis.m
@@ -225,7 +225,11 @@ if info(1)==0,
         deltaM = deltaM.*abs(params');
         deltaM(params==0)=deltaM_prior(params==0);
         quant = siJ./repmat(sqrt(diag(cmm)),1,nparam);
-        siJnorm = vnorm(quant).*normaliz1;
+        if size(quant,1)==1,
+            siJnorm = abs(quant).*normaliz1;
+        else
+            siJnorm = vnorm(quant).*normaliz1;
+        end
         %                 siJnorm = vnorm(siJ(inok,:)).*normaliz;
         quant=[];
 %         inok = find((abs(TAU)<1.e-8));
@@ -238,7 +242,11 @@ if info(1)==0,
         siH=siH(iy,:);
         if ~isempty(iy),
             quant = siH./repmat(sqrt(diag_chh(iy)),1,nparam);
-            siHnorm = vnorm(quant).*normaliz1;
+            if size(quant,1)==1,
+                siHnorm = abs(quant).*normaliz1;
+            else
+                siHnorm = vnorm(quant).*normaliz1;
+            end
         else
             siHnorm = [];
         end
@@ -254,7 +262,11 @@ if info(1)==0,
         siLRE=siLRE(iy,:);
         if ~isempty(iy),
             quant = siLRE./repmat(sqrt(diag_clre(iy)),1,np);
-            siLREnorm = vnorm(quant).*normaliz1(offset+1:end);
+            if size(quant,1)==1,
+                siLREnorm = abs(quant).*normaliz1(offset+1:end);
+            else
+                siLREnorm = vnorm(quant).*normaliz1(offset+1:end);
+            end
         else
             siLREnorm=[];
         end
diff --git a/matlab/identification_checks.m b/matlab/identification_checks.m
index 3546b0146..78b12e174 100644
--- a/matlab/identification_checks.m
+++ b/matlab/identification_checks.m
@@ -45,7 +45,11 @@ function [condJ, ind0, indnoJ, ixnoJ, McoJ, PcoJ, jweak, jweak_pair] = identific
 npar = size(JJ,2);
 indnoJ = zeros(1,npar);
 
-ind1 = find(vnorm(JJ)>=eps); % take non-zero columns
+if size(JJ,1)>1,
+    ind1 = find(vnorm(JJ)>=eps); % take non-zero columns
+else
+    ind1 = find(abs(JJ)>=eps); % take non-zero columns
+end    
 JJ1 = JJ(:,ind1);
 [eu,ee2,ee1] = svd( JJ1, 0 );
 condJ= cond(JJ1);