diff --git a/matlab/src/classes/@MatMust/MatMust.m b/matlab/src/classes/@MatMust/MatMust.m
index e93bf77747daa447ed509d26b4a617c69f732f84..3f5fae783dc589b874848c8aef92d6b7eeebfc14 100644
--- a/matlab/src/classes/@MatMust/MatMust.m
+++ b/matlab/src/classes/@MatMust/MatMust.m
@@ -168,35 +168,51 @@ classdef MatMust < handle
                     'mode', 'SIMPLE'};
 
             try
-                data = webread([obj.url,obj.urlsub, query], args{:} ,obj.GEToptions);
+                response = webread([obj.url,obj.urlsub, query], args{:} ,obj.GEToptions);
             catch ME
                 fprintf('+++ WARNING\n%s - %s\n', ME.identifier, ME.message)
                 return
             end
-
+            
+            if isa(response,'struct')
+                data{1} = response;
+            else
+                data = response;
+            end
+            
             %refine date string to adapt MATLAB date format
-            for i=1:numel(data)
-                data_par = data(i).data;
+            for i=1:numel(data{1})
+                if isempty(data{1}(i).data)
+                    fprintf('+++ WARNING\n%s for %s\n', 'No Data existing in time span', data.name)
+                    continue
+                end
+                data_par = data{1}(i).data;
                 t = num2cell(datenum(datetime('1970-01-01', 'TimeZone','utc'))+(str2num(str2mat(data_par.date))/1000/86400));
-                [data(i).data.dateMAT] = deal(t{:});
+                [data{1}(i).data.dateMAT] = deal(t{:});
                 clear t
             end
 
             if nargin > 5
                 if any(ismember(varargin,'dump'))
                     fprintf('+++++++++++++ DATA RESULT LIST +++++++++++++\n');
-                    for i=1:numel(data)
-                        data_par = data(i).data;
-                        fprintf('%s-%s: %s -> %s\n', data(i).subsystem, data(i).type, data(i).name, data(i).description );
+                    for i=1:numel(data{1})
+                         if isempty(data{i}(i).data)
+                             continue
+                         end
+                        data_par = data{i}.data;
+                        fprintf('%s-%s: %s -> %s\n', data{1}(i).subsystem, data{1}(i).type, data{1}(i).name, data{1}(i).description );
                         %TODO filter for several kind of dataType 'DOUBLE',
                         %'SIGNED_SMALL_INT', 'STRING'
-                        switch data(i).dataType
+                        switch data{1}(i).dataType
                             case 'DOUBLE'
                                 format = '%f';
-                            case 'SIGNED_SMALL_INT'
+                            case {'SIGNED_SMALL_INT', 'UNSIGNED_INT'}
                                 format = '%i';
                             case 'STRING'
                                 format = '%s';
+                            otherwise
+                                format = '%s';
+                            
                         end
                         format = ['%s - ',format,'\n'];
                         for i = 1:numel(data_par)
@@ -208,19 +224,22 @@ classdef MatMust < handle
                     fprintf('+++++++++++++++++++++++++++++++++++++++++\n');
                 end
                 if any(ismember(varargin,'plot'))
-                     for i=1:numel(data) 
-                        data_par = data(i).data;
+                     for i=1:numel(data{1}) 
+                        if isempty(data{1}(i).data)
+                             continue
+                        end
+                        data_par = data{1}(i).data;
                         figure
-                        title(sprintf('%s-%s: %s -> %s\n', data(i).subsystem, data(i).type, data(i).name, data(i).description ))
+                        title(sprintf('%s-%s: %s -> %s\n', data{1}(i).subsystem, data{1}(i).type, data{1}(i).name, data{1}(i).description ))
                         if strcmp(calibrate,'true')
                             switch class(data_par(1).calibratedValue) 
                                 case 'char'
                                     indx = [1,find(diff([data_par.value])~=0)]+1;
-                                    [ylabels,charind ] = unique(replace({data_par(indx).calibratedValue},'_',' '),'stable');
+                                    ylabels = string;
+                                    ylabels([unique([data_par.value],'stable')]) = replace({data_par(indx).calibratedValue},'_',' ');
                                     plot([data_par.dateMAT], [data_par.value], '-x' );
-                                    set(gca,'ytick',unique([data_par.value],'sorted'));
-                                    [~,si] = sort([data_par(indx(charind)).value]);
-                                    set(gca,'yticklabel', ylabels(si) );
+                                    set(gca,'ytick',unique([data_par.value],'sorted'))
+                                    set(gca,'yticklabel',ylabels)
                                     if exist('dataFigShowUpdatefcn')==2
                                         set(datacursormode(gcf),'UpdateFcn',@dataFigShowUpdatefcn)
                                     end
@@ -231,10 +250,10 @@ classdef MatMust < handle
                             plot([data_par.dateMAT], [data_par.value], '-x' );
                         end
                         xlabel('time');
-                        if isfield(data(i), 'unit')
-                            ylabel(data(i).unit);
+                        if isfield(data{1}(i), 'unit')
+                            ylabel(data{1}(i).unit);
                         end
-                        title([data(i).description,' - ',data(i).name]);
+                        title([data{1}(i).description,' - ',data{1}(i).name]);
                         datetick('x');
                         grid on
                     end
@@ -249,11 +268,12 @@ classdef MatMust < handle
             % MatMust_searchTMparFromName(obj, namequery, dataproviders, varargin)
             % 
             % dataproviders = dataprovider IdName. 
-            % namequery = The query to perform (ex. '*HGA' or 'HGA+.+state' )
+            % namequery = The query to perform (ex. '*HGA' )
             % varargin =  You can specify several options in varagin:
             %   ex: 'dump' -> print to screen the parameters found
             %   'Description' -> Extend search in Parameters Descriptions
             %   'Id' -> Extend Search in Parameter Id
+            %   'Unit' -> Extend Search in Unit name space
             %
             
             
@@ -264,10 +284,10 @@ classdef MatMust < handle
                     dataproviders = char(join(dataproviders,','));
                 end
                 try
-                    optindx = strcmp(varargin,'Description')+strcmp(varargin,'Id')+strcmp(dataproviders,'name');
+                    optindx = strcmp(varargin,'Description')+strcmp(varargin,'Unit')+strcmp(varargin,'Id');
                     if any(find(optindx))
                         field = join(varargin(find(optindx)),',');
-                        response = webread([obj.url,obj.urlsub, query], 'field',[char(field)],'text',namequery,'dataproviders', dataproviders ,obj.GEToptions);
+                        response = webread([obj.url,obj.urlsub, query], 'field',['name,',char(field)],'text',namequery,'dataproviders', dataproviders ,obj.GEToptions);
                     else
                         
                         response = webread([obj.url,obj.urlsub, query], 'field','name','text',namequery,'dataproviders', dataproviders ,obj.GEToptions);