diff --git a/src/g5505_file_reader.py b/src/g5505_file_reader.py
index 97abb1a..f069e63 100644
--- a/src/g5505_file_reader.py
+++ b/src/g5505_file_reader.py
@@ -93,10 +93,12 @@ def read_txt_files_as_dict(filename : str ):
         file_encoding = 'latin-1'
     elif 'ICAD' in filename and 'HONO' in filename:
         table_header = 'Start Date/Time (UTC)	Duration (s)	NO2 (ppb)	NO2 Uncertainty (ppb)	H2O (ppb)	H2O Uncertainty (ppb)	CHOCHO (ppb)	CHOCHO Uncertainty (ppb)	File Number	Light Intensity	#ICEDOAS iter.	Cell Pressure	Ambient Pressure	Cell Temp	Spec Temp	Lat	Lon	Height	Speed	GPSQuality	0-Air Ref. Time	0-Air Ref. Duration	0-Air Ref. File Number	0-Air Ref. Intensity	0-Air Ref. Rel Intensity	0-Air Ref. Intensity valid	MeasMode	SampleSource'
-        separator = '\t'        
+        separator = '\t' 
+        file_encoding = 'latin-1'       
     elif 'ICAD' in filename and 'NO2' in filename:
         table_header = 'Start Date/Time (UTC)	Duration (s)	NO2 (ppb)	NO2 Uncertainty (ppb)	H2O (ppb)	H2O Uncertainty (ppb)	CHOCHO (ppb)	CHOCHO Uncertainty (ppb)	File Number	Light Intensity	#ICEDOAS iter.	Cell Pressure	Ambient Pressure	Cell Temp	Spec Temp	Lat	Lon	Height	Speed	GPSQuality	0-Air Ref. Time	0-Air Ref. Duration	0-Air Ref. File Number	0-Air Ref. Intensity	0-Air Ref. Rel Intensity	0-Air Ref. Intensity valid	MeasMode	SampleSource'
         separator = '\t'
+        file_encoding = 'latin-1'
     else:
         return {}
         #raise ValueError('intrument_folder must be set as a either "RGA" or "Pressure"')
@@ -107,33 +109,32 @@ def read_txt_files_as_dict(filename : str ):
     # Work with copy of the file for safety
     tmp_filename = utils.make_file_copy(source_file_path=filename)
 
-    with open(tmp_filename,'r',encoding=file_encoding,errors='ignore') as f:
-        #file_encoding = f.encoding
-        #table_preamble = ""
+    #with open(tmp_filename,'rb',encoding=file_encoding,errors='ignore') as f:
+    with open(tmp_filename,'rb') as f:
         table_preamble = []
         for line_number, line in enumerate(f):        
             
-            if table_header in line:   
-                list_of_substrings = line.split(separator)             
+            if table_header in line.decode(file_encoding):   
+                list_of_substrings = line.decode(file_encoding).split(separator)             
                 data_start = True  
                 column_names = []
                 for i, name in enumerate(list_of_substrings):
                     column_names.append(str(i)+'_'+name) 
 
-                print(line_number, len(column_names ))
+                #print(line_number, len(column_names ),'\n')
                 break
             # Subdivide line into words, and join them by single space. 
             # I asumme this can produce a cleaner line that contains no weird separator characters \t \r or extra spaces and so on.
-            list_of_substrings = line.split()
+            list_of_substrings = line.decode(file_encoding).split()
             # TODO: ideally we should use a multilinear string but the yalm parser is not recognizing \n as special character
             #line = ' '.join(list_of_substrings+['\n'])
-            line = ' '.join(list_of_substrings)     
-            table_preamble.append(line)# += new_line  
+            #line = ' '.join(list_of_substrings)     
+            table_preamble.append(' '.join(list_of_substrings))# += new_line  
 
         header_dict["table_preamble"] = table_preamble
 
    
-    # TODO: it does not work with separater as none :(. fix for RGA
+    # TODO: it does not work with separator as none :(. fix for RGA
     try:
         df = pd.read_csv(tmp_filename, 
                         delimiter = separator,