diff --git a/zUtil_TomoUtils/gtHSTParamReader.m b/zUtil_TomoUtils/gtHSTParamReader.m
index 01b43ae1e4d2b4f00561e86737c60b1402105acd..cef4eb3f0d8555d869ff39f0ea60164d9fea6b86 100644
--- a/zUtil_TomoUtils/gtHSTParamReader.m
+++ b/zUtil_TomoUtils/gtHSTParamReader.m
@@ -21,16 +21,16 @@ function par = gtHSTParamReader(filename)
 par = [];
 pattern = '(?<parameter>.*)=(?<value>.*)';
 if ~exist(filename,'file')
-    error(['Could not find ' filename]);
+    gtError('gtHSTParamReader', ['Could not find ' filename]);
 end
 
 fid = fopen(filename,'rt');
 if fid==-1
-    error(['Could not open ' filename]);
+    gtError('gtHSTParamReader', ['Could not open ' filename]);
 end
 
 % Initialize correct_rings_nb
-par = setfield(par, 'correct_rings_nb', -1);
+par.correct_rings_nb = -1;
 
 while ~feof(fid)
     txt = fgetl(fid);
@@ -50,24 +50,15 @@ while ~feof(fid)
 
         if regexp(field,'^ar2(\d+)')
             value = regexprep(field,'ar2(\d+)','$1');
-            nb = str2num(value)/2 -1;
-            par = setfield(par, 'correct_rings_nb', nb);
+            par.correct_rings_nb = str2double(value)/2 -1;
             continue;
         end
 
-        test = [];
-        if ~isempty(regexp(tmp.value,'[0-9]'))
-            test = str2num(tmp.value);
-        end
-        try
-            if isempty(test)
-                par = setfield(par, field, tmp.value);
-            else
-                par = setfield(par, field, test);
-            end
-        catch
-            warning('Didn''t understand this header');
-            disp(field);
+        nb = str2num(tmp.value);
+        if ~isempty(regexp(tmp.value, '[0-9]', 'once')) && ~isempty(nb)
+            par.(field) = nb;
+        else
+            par.(field) = tmp.value;
         end
     else
         disp(txt);
@@ -78,11 +69,11 @@ end
 ndx = find(par.options==':') + 2;
 tmp.padding = par.options(ndx(1));
 tmp.axis    = par.options(ndx(2));
-par = setfield(par, 'options_padding', tmp.padding);
-par = setfield(par, 'options_axis', tmp.axis);
+par.options_padding = tmp.padding;
+par.options_axis = tmp.axis;
 if length(ndx) > 2
     tmp.avoid   = par.options(ndx(3));
-    par = setfield(par, 'options_avoidhalftomo', tmp.avoid);
+    par.options_avoidhalftomo = tmp.avoid;
 end
 
 par.ccd_filter_para = sscanf(par.ccd_filter_para, '{"threshold":%f}');
@@ -95,17 +86,15 @@ end % end of function
 % SUB-FUNCTIONS
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 
-function field=sfCleanField(str)
+function field = sfCleanField(str)
 % SFCLEANFIELD  Removes weird characters (spaces, parentheses) from field.
-
     str = lower(strtrim(str));
-    str(find(str==' ')) = '_';
-    str(find(str=='(')) = [];
-    str(find(str==')')) = [];
-    str(find(str=='-')) = '_';
-    str(find(str=='[')) = [];
-    str(find(str==']')) = [];
-    str(find(str==':')) = [];
+    str(str==' ') = '_';
+    str(str=='(') = [];
+    str(str==')') = [];
+    str(str=='-') = '_';
+    str(str=='[') = [];
+    str(str==']') = [];
+    str(str==':') = [];
     field = str;
-
 end % end of sfCleanField