diff --git a/jdatadecode.m b/jdatadecode.m
index 24472c7..4b23e3d 100644
--- a/jdatadecode.m
+++ b/jdatadecode.m
@@ -124,7 +124,7 @@
                 decompfun=str2func([zipmethod 'decode']);
                 arraytype=data(j).(N_('_ArrayType_'));
                 chartype=0;
-                if(strcmp(arraytype,'char'))
+                if(strcmp(arraytype,'char') || strcmp(arraytype,'logical'))
                     chartype=1;
                     arraytype='uint8';
                 end
diff --git a/jsave.m b/jsave.m
index d2541e2..bb0861c 100644
--- a/jsave.m
+++ b/jsave.m
@@ -96,4 +96,4 @@ function jsave(filename, varargin)
 
 savefun('WorkspaceHeader',header,'filename',filename,varargin{:});
 savefun('WorkspaceData',body,'filename',filename,'append',1,...
-    'compression','zlib',varargin{:});
+    'compression','zlib','keeptype',1,'array2struct',1,varargin{:});
diff --git a/loadjson.m b/loadjson.m
index 00be04a..da1e1f0 100644
--- a/loadjson.m
+++ b/loadjson.m
@@ -25,7 +25,7 @@
 %           to a field in opt. opt can have the following 
 %           fields (first in [.|.] is the default)
 %
-%           SimplifyCell [0|1]: if set to 1, loadjson will call cell2mat
+%           SimplifyCell [1|0]: if set to 1, loadjson will call cell2mat
 %                         for each element of the JSON data, and group 
 %                         arrays based on the cell2mat rules.
 %           FastArrayParser [1|0 or integer]: if set to 1, use a
@@ -281,22 +281,27 @@
     end
 
     if(varargin{1}.simplifycell)
-      try
-        oldobj=object;
-        if(iscell(object) && length(object)>1 && ndims(object{1})>=2)
-            catdim=size(object{1});
-            catdim=ndims(object{1})-(catdim(end)==1)+1;
-            object=cat(catdim,object{:});
-            object=permute(object,ndims(object):-1:1);
-        else
-            object=cell2mat(object')';
-        end
-        if(iscell(oldobj) && isstruct(object) && numel(object)>1 && varargin{1}.simplifycellarray==0)
-            object=oldobj;
-        elseif(~iscell(object) && size(object,1)>1 && ndims(object)==2)
+      if(iscell(object) && ~isempty(object) && isnumeric(object{1}))
+          if(all(cellfun(@(e) isequal(size(object{1}), size(e)) , object(2:end))))
+              try
+                  oldobj=object;
+                  if(iscell(object) && length(object)>1 && ndims(object{1})>=2)
+                      catdim=size(object{1});
+                      catdim=ndims(object{1})-(catdim(end)==1)+1;
+                      object=cat(catdim,object{:});
+                      object=permute(object,ndims(object):-1:1);
+                  else
+                      object=cell2mat(object')';
+                  end
+                  if(iscell(oldobj) && isstruct(object) && numel(object)>1 && varargin{1}.simplifycellarray==0)
+                      object=oldobj;
+                  end
+              catch
+              end
+          end
+      end
+      if(~iscell(object) && size(object,1)>1 && ndims(object)==2)
             object=object';
-        end
-      catch
       end
     end
     pos=parse_char(inputstr, pos, ']');
diff --git a/loadmsgpack.m b/loadmsgpack.m
index 516e0ea..87ec3b3 100644
--- a/loadmsgpack.m
+++ b/loadmsgpack.m
@@ -228,20 +228,22 @@
     end
     if(varargin{1}.simplifycell)
         if(iscell(out) && ~isempty(out) && isnumeric(out{1}))
-          try
-              oldobj=out;
-              if(iscell(out) && length(out)>1 && ndims(out{1})>=2)
-                  catdim=size(out{1});
-                  catdim=ndims(out{1})-(catdim(end)==1)+1;
-                  out=cat(catdim,out{:});
-                  out=permute(out,ndims(out):-1:1);
-              else
-                  out=cell2mat(out')';
+          if(all(cellfun(@(e) isequal(size(out{1}), size(e)) , out(2:end))))
+              try
+                  oldobj=out;
+                  if(iscell(out) && length(out)>1 && ndims(out{1})>=2)
+                      catdim=size(out{1});
+                      catdim=ndims(out{1})-(catdim(end)==1)+1;
+                      out=cat(catdim,out{:});
+                      out=permute(out,ndims(out):-1:1);
+                  else
+                      out=cell2mat(out')';
+                  end
+                  if(iscell(oldobj) && isstruct(out) && numel(out)>1 && varargin{1}.simplifycellarray==0)
+                      out=oldobj;
+                  end  
+              catch
               end
-              if(iscell(oldobj) && isstruct(out) && numel(out)>1 && varargin{1}.simplifycellarray==0)
-                  out=oldobj;
-              end  
-          catch
           end
         end
         if(~iscell(out) && size(out,2)>1 && ndims(out)==2)
diff --git a/loadubjson.m b/loadubjson.m
index 659bc12..180c449 100644
--- a/loadubjson.m
+++ b/loadubjson.m
@@ -72,7 +72,7 @@
 
     opt=varargin2struct(varargin{:});
     opt.arraytoken_=arraytoken;
-    opt.simplifycell=jsonopt('SimplifyCell',0,opt);
+    opt.simplifycell=jsonopt('SimplifyCell',1,opt);
     opt.simplifycellarray=jsonopt('SimplifyCellArray',0,opt);
     opt.usemap=jsonopt('UseMap',0,opt);
     opt.nameisstring=jsonopt('NameIsString',0,opt);
@@ -193,21 +193,23 @@
     end
     if(varargin{1}.simplifycell)
       if(iscell(object) && ~isempty(object) && isnumeric(object{1}))
-      try
-        oldobj=object;
-        if(iscell(object) && length(object)>1 && ndims(object{1})>=2)
-            catdim=size(object{1});
-            catdim=ndims(object{1})-(catdim(end)==1)+1;
-            object=cat(catdim,object{:});
-            object=permute(object,ndims(object):-1:1);
-        else
-            object=cell2mat(object')';
-        end
-        if(iscell(oldobj) && isstruct(object) && numel(object)>1 && varargin{1}.simplifycellarray==0)
-            object=oldobj;
-        end
-      catch
-      end
+          if(all(cellfun(@(e) isequal(size(object{1}), size(e)) , object(2:end))))
+              try
+                  oldobj=object;
+                  if(iscell(object) && length(object)>1 && ndims(object{1})>=2)
+                      catdim=size(object{1});
+                      catdim=ndims(object{1})-(catdim(end)==1)+1;
+                      object=cat(catdim,object{:});
+                      object=permute(object,ndims(object):-1:1);
+                  else
+                      object=cell2mat(object')';
+                  end
+                  if(iscell(oldobj) && isstruct(object) && numel(object)>1 && varargin{1}.simplifycellarray==0)
+                      object=oldobj;
+                  end
+              catch
+              end
+          end
       end
       if(~iscell(object) && size(object,1)>1 && ndims(object)==2)
             object=object';
diff --git a/saveubjson.m b/saveubjson.m
index 65bac6f..ca871be 100644
--- a/saveubjson.m
+++ b/saveubjson.m
@@ -156,6 +156,7 @@
 opt.messagepack=jsonopt('MessagePack',0,opt);
 opt.num2cell_=0;
 opt.ubjson=bitand(jsonopt('UBJSON',0,opt), ~opt.messagepack);
+opt.keeptype=jsonopt('KeepType',0,opt);
 opt.nosubstruct_=0;
 
 if(jsonopt('PreEncode',1,opt))
@@ -375,7 +376,7 @@
 Amarker=varargin{1}.AM_;
 Omarker=varargin{1}.OM_;
 
-if(isfield(item,N_('_ArrayType_',varargin{:})))
+if(isfield(item,encodevarname('_ArrayType_',varargin{:})))
     varargin{1}.nosubstruct_=1;
 end
 
@@ -721,11 +722,19 @@
    varargin{1}.num2cell_=1;
 end
 
-if(isa(mat,'integer') || isinteger(mat) || (isfloat(mat) && all(mod(mat(:),1) == 0)))
+if(isa(mat,'integer') || isinteger(mat) || (~varargin{1}.keeptype && isfloat(mat) && all(mod(mat(:),1) == 0)))
     if(~isvector(mat) && isnest==1)
         txt=cell2ubjson('',num2cell(mat,1),level,varargin{:});
     elseif(~ismsgpack || size(mat,1)==1)
-        if(~any(mat<0))
+        if(0 && varargin{1}.keeptype)
+            itype=class(mat);
+            idx=find(ismember(varargin{1}.IType_,itype));
+            if(isempty(idx))
+                idx=find(ismember(varargin{1}.IType_,itype(2:end)));
+            end
+            type=Imarker(idx);
+            varargin{1}.inttype_=idx;
+        elseif(~any(mat<0))
             cid=varargin{1}.IType_;
             type=Imarker(end);
             maxdata=max(double(mat(:)));
@@ -826,8 +835,16 @@
     error('input is not an integer');
 end
 Imarker=varargin{1}.IM_;
+cid=varargin{1}.IType_;
 isdebug=varargin{1}.debug;
-
+if(isfield(varargin{1},'inttype_'))
+    if(isdebug)
+        val=[Imarker(varargin{1}.inttype_) sprintf('<%d>',num)];
+    else
+        val=[Imarker(varargin{1}.inttype_) data2byte(swapbytes(cast(num,cid{varargin{1}.inttype_})),'uint8')];
+    end
+    return;
+end
 if(Imarker(1)~='U')
     if(num>=0 && num<127)
        val=uint8(num);
@@ -843,7 +860,6 @@
    return;
 end
 key=Imarker;
-cid=varargin{1}.IType_;
 for i=1:length(cid)
   if(num==cast(num,cid{i}))
     if(isdebug)