diff --git a/.clang-format b/.clang-format
index 2a4b7953..d6ec39a3 100644
--- a/.clang-format
+++ b/.clang-format
@@ -2,6 +2,6 @@ BasedOnStyle: LLVM
 IndentWidth: 4
 
 UseTab: Never
-ColumnLimit: 80
+ColumnLimit: 120
 AlignConsecutiveAssignments: false 
 AlignConsecutiveMacros: true
\ No newline at end of file
diff --git a/.vscode/c_cpp_properties.json b/.vscode/c_cpp_properties.json
index 10e21c5c..930311e7 100644
--- a/.vscode/c_cpp_properties.json
+++ b/.vscode/c_cpp_properties.json
@@ -12,7 +12,8 @@
             "cppStandard": "c++17",
             "intelliSenseMode": "linux-gcc-x64",
             "configurationProvider": "ms-vscode.cmake-tools",
-            "compilerArgs": []
+            "compilerArgs": [],
+            "compileCommands": "/home/l_bechir/github/aare/build/compile_commands.json"
         }
     ],
     "version": 4
diff --git a/.vscode/launch.json b/.vscode/launch.json
new file mode 100644
index 00000000..ba0f5fea
--- /dev/null
+++ b/.vscode/launch.json
@@ -0,0 +1,55 @@
+{
+    "configurations": [
+        {
+            "name": "(gdb) Launch",
+            "type": "cppdbg",
+            "request": "launch",
+            "program": "${workspaceFolder}/build/aare",
+            "args": [],
+            "stopAtEntry": true,
+            "cwd": "${fileDirname}",
+            "environment": [],
+            "externalConsole": false,
+            "MIMode": "gdb",
+            "setupCommands": [
+                {
+                    "description": "Enable pretty-printing for gdb",
+                    "text": "-enable-pretty-printing",
+                    "ignoreFailures": true
+                },
+                {
+                    "description": "Set Disassembly Flavor to Intel",
+                    "text": "-gdb-set disassembly-flavor intel",
+                    "ignoreFailures": true
+                }
+            ]
+        },
+        {
+            "name": "C/C++: g++ build and debug active file",
+            "type": "cppdbg",
+            "request": "launch",
+            "program": "${fileDirname}/${fileBasenameNoExtension}",
+            "args": [],
+            "stopAtEntry": false,
+            "cwd": "${fileDirname}",
+            "environment": [],
+            "externalConsole": false,
+            "MIMode": "gdb",
+            "setupCommands": [
+                {
+                    "description": "Enable pretty-printing for gdb",
+                    "text": "-enable-pretty-printing",
+                    "ignoreFailures": true
+                },
+                {
+                    "description": "Set Disassembly Flavor to Intel",
+                    "text": "-gdb-set disassembly-flavor intel",
+                    "ignoreFailures": true
+                }
+            ],
+            "preLaunchTask": "C/C++: g++ build active file",
+            "miDebuggerPath": "/usr/bin/gdb"
+        }
+    ],
+    "version": "2.0.0"
+}
\ No newline at end of file
diff --git a/.vscode/settings.json b/.vscode/settings.json
index c31a2abf..3e8d822e 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -70,7 +70,22 @@
         "stop_token": "cpp",
         "thread": "cpp",
         "valarray": "cpp",
-        "variant": "cpp"
+        "variant": "cpp",
+        "bitset": "cpp",
+        "charconv": "cpp",
+        "chrono": "cpp",
+        "format": "cpp",
+        "__bit_reference": "cpp",
+        "__config": "cpp",
+        "__hash_table": "cpp",
+        "__locale": "cpp",
+        "__node_handle": "cpp",
+        "__split_buffer": "cpp",
+        "__threading_support": "cpp",
+        "__verbose_abort": "cpp",
+        "execution": "cpp",
+        "ios": "cpp",
+        "locale": "cpp"
     },
     "C_Cpp.errorSquiggles": "enabled"
 }
\ No newline at end of file
diff --git a/.vscode/tasks.json b/.vscode/tasks.json
new file mode 100644
index 00000000..eb42ea1a
--- /dev/null
+++ b/.vscode/tasks.json
@@ -0,0 +1,25 @@
+{
+    "tasks": [
+        {
+            "type": "cppbuild",
+            "label": "C/C++: g++ build active file",
+            "command": "/usr/bin/g++",
+            "args": [
+                "-fdiagnostics-color=always",
+                "-g",
+                "${file}",
+                "-o",
+                "${fileDirname}/${fileBasenameNoExtension}"
+            ],
+            "options": {
+                "cwd": "${fileDirname}"
+            },
+            "problemMatcher": [
+                "$gcc"
+            ],
+            "group": "build",
+            "detail": "Task generated by Debugger."
+        }
+    ],
+    "version": "2.0.0"
+}
\ No newline at end of file
diff --git a/CMakeLists.txt b/CMakeLists.txt
index eb20097c..f3c82b31 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -25,7 +25,7 @@ find_package(fmt 6 REQUIRED)
 set(CMAKE_BUILD_TYPE "Debug")
 
 if (CMAKE_BUILD_TYPE STREQUAL "Debug")
-    set(OPTIMIZATION_FLAGS "-Og -ggdb3")
+    set(OPTIMIZATION_FLAGS "-Og -ggdb3 -D_GLIBCXX_DEBUG -D_GLIBCXX_DEBUG_PEDANTIC")
 else()
     set(OPTIMIZATION_FLAGS "-O3")
 endif()
diff --git a/data/m3_d0_f0_0.raw b/data/m3_d0_f0_0.raw
new file mode 100644
index 00000000..ab85ccf2
Binary files /dev/null and b/data/m3_d0_f0_0.raw differ
diff --git a/data/m3_master_0.json b/data/m3_master_0.json
new file mode 100644
index 00000000..f6b4f316
--- /dev/null
+++ b/data/m3_master_0.json
@@ -0,0 +1,55 @@
+{
+    "Version": 7.1,
+    "Timestamp": "Wed Sep 21 13:48:10 2022",
+    "Detector Type": "Mythen3",
+    "Timing Mode": "auto",
+    "Geometry": {
+        "x": 1,
+        "y": 1
+    },
+    "Image Size in bytes": 15360,
+    "Pixels": {
+        "x": 3840,
+        "y": 1
+    },
+    "Max Frames Per File": 10000,
+    "Frame Discard Policy": "nodiscard",
+    "Frame Padding": 1,
+    "Scan Parameters": "[disabled]",
+    "Total Frames": 1,
+    "Receiver Roi": {
+        "xmin": 4294967295,
+        "xmax": 4294967295,
+        "ymin": 4294967295,
+        "ymax": 4294967295
+    },
+    "Dynamic Range": 32,
+    "Ten Giga": 1,
+    "Period": "2ms",
+    "Counter Mask": "0x7",
+    "Exptime1": "0.1s",
+    "Exptime2": "0.1s",
+    "Exptime3": "0.1s",
+    "GateDelay1": "0ns",
+    "GateDelay2": "0ns",
+    "GateDelay3": "0ns",
+    "Gates": 1,
+    "Threshold Energies": "[-1, -1, -1]",
+    "Frames in File": 1,
+    "Frame Header Format": {
+        "Frame Number": "8 bytes",
+        "SubFrame Number/ExpLength": "4 bytes",
+        "Packet Number": "4 bytes",
+        "Bunch ID": "8 bytes",
+        "Timestamp": "8 bytes",
+        "Module Id": "2 bytes",
+        "Row": "2 bytes",
+        "Column": "2 bytes",
+        "Reserved": "2 bytes",
+        "Debug": "4 bytes",
+        "Round Robin Number": "2 bytes",
+        "Detector Type": "1 byte",
+        "Header Version": "1 byte",
+        "Packets Caught Mask": "64 bytes"
+    }
+}
\ No newline at end of file
diff --git a/src/file_io/CMakeLists.txt b/src/file_io/CMakeLists.txt
index f4029196..f990c9b9 100644
--- a/src/file_io/CMakeLists.txt
+++ b/src/file_io/CMakeLists.txt
@@ -4,6 +4,7 @@ target_include_directories(aare PUBLIC "${CMAKE_CURRENT_SOURCE_DIR}")
 
 set(FILE_IO_SOURCES "file/File.cpp"
                     "file/JsonFile.cpp"
+                    "file/SubFile.cpp"
                     "file_factory/FileFactory.cpp"
                     "file_factory/JsonFileFactory.cpp"
                     "file_factory/RawFileFactory.cpp"
diff --git a/src/file_io/file/File.hpp b/src/file_io/file/File.hpp
index ed101a59..269e3941 100644
--- a/src/file_io/file/File.hpp
+++ b/src/file_io/file/File.hpp
@@ -1,15 +1,33 @@
 #pragma once
 
-#include <filesystem>
 #include "defs.hpp"
+#include <filesystem>
 #include <fmt/core.h>
+#include "SubFile.hpp"
+
+struct RawFileConfig {
+    int module_gap_row{};
+    int module_gap_col{};
+
+    bool operator==(const RawFileConfig &other) const {
+        if (module_gap_col != other.module_gap_col)
+            return false;
+        if (module_gap_row != other.module_gap_row)
+            return false;
+        return true;
+    }
+};
+
+
 
-class File
-{
-public:
-std::filesystem::path fname;
+class File {
+    private:
+    using config = RawFileConfig;
+  public:
+    std::vector<SubFileVariants> subfiles;
+    std::filesystem::path fname;
     std::filesystem::path base_path;
-    std::string base_name,ext;
+    std::string base_name, ext;
     int findex, n_subfiles;
     size_t total_frames{};
 
@@ -17,27 +35,22 @@ std::filesystem::path fname;
     DetectorType type;
     TimingMode timing_mode;
     int subfile_rows, subfile_cols;
-    bool quad {false};
-
-
-
+    bool quad{false};
 
     ssize_t rows{};
     ssize_t cols{};
     uint8_t bitdepth{};
     std::vector<xy> positions;
 
+    config cfg{0,0};
     // File();
     // ~File();
-    
-
 
-
-    inline size_t bytes_per_frame() const{
-        return rows*cols*bitdepth/8;
-    }
-    inline size_t pixels() const{
-        return rows*cols;
+    inline size_t bytes_per_frame() const { return rows * cols * bitdepth / 8; }
+    inline size_t pixels() const { return rows * cols; }
+    inline void set_config(int row,int col){
+        cfg.module_gap_row = row;
+        cfg.module_gap_col = col;
     }
 
     // TODO! Deal with fast quad and missing files
@@ -49,13 +62,13 @@ std::filesystem::path fname;
         n_subfiles = n_mod;
     }
 
-
     inline std::filesystem::path master_fname() {
-    return base_path / fmt::format("{}_master_{}{}", base_name, findex, ext);
+        return base_path /
+               fmt::format("{}_master_{}{}", base_name, findex, ext);
     }
     inline std::filesystem::path data_fname(int mod_id, int file_id) {
-        return base_path / fmt::format("{}_d{}_f{}_{}.raw", base_name, mod_id, file_id, findex);
+        return base_path / fmt::format("{}_d{}_f{}_{}.raw", base_name, mod_id,
+                                       file_id, findex);
     }
     // size_t total_frames();
-
 };
diff --git a/src/file_io/file/SubFile.cpp b/src/file_io/file/SubFile.cpp
new file mode 100644
index 00000000..2e4dd703
--- /dev/null
+++ b/src/file_io/file/SubFile.cpp
@@ -0,0 +1,71 @@
+#include "SubFile.hpp"
+#include <iostream>
+// #include <filesystem>
+
+/**
+ * SubFile methods
+ *
+ *
+ */
+template <class Header, class DataType>
+SubFile<Header, DataType>::SubFile(std::filesystem::path fname, ssize_t rows, ssize_t cols) : rows(rows), cols(cols) {
+    fp = fopen(fname.c_str(), "rb");
+    if (fp == nullptr) {
+        throw std::runtime_error("Could not open file " + fname.string());
+    }
+    std::cout<<"File opened"<<std::endl;
+    n_frames = std::filesystem::file_size(fname) / (sizeof(Header) + rows * cols * sizeof(DataType));
+    std::cout<<"Number of frames: "<<n_frames<<std::endl;
+
+}
+/**
+ * NormalSubFile methods
+*/
+template <class Header, class DataType>
+NormalSubFile<Header, DataType>::NormalSubFile(std::filesystem::path fname, ssize_t rows, ssize_t cols)
+    : SubFile<Header, DataType>(fname, rows, cols){};
+
+template <class Header, class DataType> size_t NormalSubFile<Header, DataType>::read_impl(std::byte *buffer) {
+    return fread(reinterpret_cast<char *>(buffer), sizeof(DataType) * this->rows * this->cols, 1, this->fp);
+};
+
+
+
+/**
+ * ReorderM03SubFile methods
+*/
+template <class Header, class DataType>
+ReorderM03SubFile<Header, DataType>::ReorderM03SubFile(std::filesystem::path fname, ssize_t rows, ssize_t cols)
+    : SubFile<Header, DataType>(fname, rows, cols){};
+
+template <class Header, class DataType> size_t ReorderM03SubFile<Header, DataType>::read_impl(std::byte *buffer) {
+    std::vector<DataType> tmp(this->pixels_per_frame());
+    size_t rc = fread(reinterpret_cast<char *>(&tmp[0]), this->bytes_per_frame(), 1, this->fp);
+
+    int adc_nr[32] = {300, 325, 350, 375, 300, 325, 350, 375, 200, 225, 250, 275, 200, 225, 250, 275,
+                      100, 125, 150, 175, 100, 125, 150, 175, 0,   25,  50,  75,  0,   25,  50,  75};
+    int sc_width = 25;
+    int nadc = 32;
+    int pixels_per_sc = 5000;
+
+    auto dst = reinterpret_cast<DataType *>(buffer);
+    int pixel = 0;
+    for (int i = 0; i != pixels_per_sc; ++i) {
+        for (int i_adc = 0; i_adc != nadc; ++i_adc) {
+            int col = adc_nr[i_adc] + (i % sc_width);
+            int row;
+            if ((i_adc / 4) % 2 == 0)
+                row = 199 - int(i / sc_width);
+            else
+                row = 200 + int(i / sc_width);
+
+            dst[col + row * 400] = tmp[pixel];
+            pixel++;
+        }
+    }
+    return rc;
+};
+
+template class NormalSubFile<sls_detector_header, uint16_t>;
+template class NormalSubFile<sls_detector_header, uint32_t>;
+template class ReorderM03SubFile<sls_detector_header, uint16_t>;
diff --git a/src/file_io/file/SubFile.hpp b/src/file_io/file/SubFile.hpp
new file mode 100644
index 00000000..4d7980a6
--- /dev/null
+++ b/src/file_io/file/SubFile.hpp
@@ -0,0 +1,47 @@
+#pragma once
+#include "defs.hpp"
+#include <cstdint>
+#include <filesystem>
+#include <variant>
+
+template <class Header, class DataType> class SubFile {
+  protected:
+    FILE *fp = nullptr;
+
+  public:
+    SubFile(std::filesystem::path fname, ssize_t rows, ssize_t cols);
+    inline size_t bytes_per_frame() const { return sizeof(DataType) * rows * cols; }
+
+    inline size_t pixels_per_frame() const { return rows * cols; }
+
+
+    ssize_t rows{};
+    ssize_t cols{};
+    ssize_t n_frames{};
+    int sub_file_index_{};
+    size_t read_impl(std::byte *buffer){};
+    
+};
+
+template <class Header, class DataType> class NormalSubFile : public SubFile<Header, DataType> {
+  public:
+    NormalSubFile(std::filesystem::path fname, ssize_t rows, ssize_t cols);
+    size_t read_impl(std::byte *buffer);
+};
+
+// template <class Header, class DataType>
+// class FlipSubFile : public SubFile<Header, DataType>{
+//     size_t read_impl() override;
+// };
+
+template <class Header, class DataType> class ReorderM03SubFile : public SubFile<Header, DataType> {
+  public:
+    ReorderM03SubFile(std::filesystem::path fname, ssize_t rows, ssize_t cols);
+    size_t read_impl(std::byte *buffer);
+};
+
+using JungfrauSubFile = NormalSubFile<sls_detector_header, uint16_t>;
+using Moench03SubFile = ReorderM03SubFile<sls_detector_header, uint16_t>;
+using Mythen3SubFile = NormalSubFile<sls_detector_header, uint32_t>;
+
+using SubFileVariants = std::variant<JungfrauSubFile, Mythen3SubFile, Moench03SubFile>;
diff --git a/src/file_io/file_factory/FileFactory.cpp b/src/file_io/file_factory/FileFactory.cpp
index 601108e7..46e69c48 100644
--- a/src/file_io/file_factory/FileFactory.cpp
+++ b/src/file_io/file_factory/FileFactory.cpp
@@ -72,5 +72,5 @@ void FileFactory::find_geometry(File& file) {
     file.rows = r * file.subfile_rows;
     file.cols = c * file.subfile_cols;
 
-    file.rows += (r - 1) * cfg.module_gap_row;
+    file.rows += (r - 1) * file.cfg.module_gap_row;
 }
\ No newline at end of file
diff --git a/src/file_io/file_factory/FileFactory.hpp b/src/file_io/file_factory/FileFactory.hpp
index 6bf251cc..7182fb07 100644
--- a/src/file_io/file_factory/FileFactory.hpp
+++ b/src/file_io/file_factory/FileFactory.hpp
@@ -14,7 +14,7 @@ class FileFactory{
     virtual void parse_metadata(File&){};
     
     
-    void find_geometry(File&){};
+    void find_geometry(File&);
     void parse_fname(File&);
 
     template <typename Header> Header read_header(const std::filesystem::path &fname);
diff --git a/src/file_io/file_factory/JsonFileFactory.cpp b/src/file_io/file_factory/JsonFileFactory.cpp
index 9b46c990..f3a909a8 100644
--- a/src/file_io/file_factory/JsonFileFactory.cpp
+++ b/src/file_io/file_factory/JsonFileFactory.cpp
@@ -1,33 +1,32 @@
 #include "JsonFileFactory.hpp"
 #include "JsonFile.hpp"
+#include "defs.hpp"
 #include "helpers.hpp"
-#include <iostream>
 #include <fstream>
-#include "defs.hpp"
+#include <iostream>
 #include <nlohmann/json.hpp>
+#include "SubFile.hpp"
 
 using json = nlohmann::json;
 
-
-
-
-JsonFileFactory::JsonFileFactory(std::filesystem::path fpath){
-    if(not is_master_file(fpath))
+JsonFileFactory::JsonFileFactory(std::filesystem::path fpath) {
+    if (not is_master_file(fpath))
         throw std::runtime_error("Json file is not a master file");
     this->fpath = fpath;
 }
 
-void JsonFileFactory::parse_metadata(File& file){
-    std::cout<<"Parsing metadata"<<std::endl;
+void JsonFileFactory::parse_metadata(File &file) {
+    std::cout << "Parsing metadata" << std::endl;
     std::ifstream ifs(file.master_fname());
     json j;
     ifs >> j;
     double v = j["Version"];
     file.version = fmt::format("{:.1f}", v);
-    std::string tmp;
-    j["Detector Type"].get_to(tmp);
-    file.type = StringTo<DetectorType>(tmp);
-    file.timing_mode = StringTo<TimingMode>(j["Timing Mode"].get<std::string>());
+    // std::string tmp;
+    // j["Detector Type"].get_to(tmp);
+    file.type = StringTo<DetectorType>(j["Detector Type"].get<std::string>());
+    file.timing_mode =
+        StringTo<TimingMode>(j["Timing Mode"].get<std::string>());
     file.total_frames = j["Frames in File"];
     file.subfile_cols = j["Pixels"]["x"];
     file.subfile_rows = j["Pixels"]["y"];
@@ -40,24 +39,30 @@ void JsonFileFactory::parse_metadata(File& file){
     if (file.type == DetectorType::Eiger) {
         file.quad = (j["Quad"] == 1);
     }
+}
 
-
-
-
+void JsonFileFactory::open_subfiles(File &file) {
+    for (int i = 0; i != file.n_subfiles; ++i) {
+        if (file.type == DetectorType::Jungfrau)
+            file.subfiles.push_back(JungfrauSubFile(file.data_fname(i, 0), file.subfile_rows, file.subfile_cols));
+        else if (file.type == DetectorType::Mythen3)
+            file.subfiles.push_back(Mythen3SubFile(file.data_fname(i, 0), file.subfile_rows, file.subfile_cols));
+        else if (file.type == DetectorType::Moench)
+            file.subfiles.push_back(Moench03SubFile(file.data_fname(i, 0), file.subfile_rows, file.subfile_cols));
+        else
+            throw std::runtime_error("File not supported");
+    }
 }
 
-File JsonFileFactory::loadFile(){
-    std::cout<<"Loading json file"<<std::endl;
+File JsonFileFactory::loadFile() {
+    std::cout << "Loading json file" << std::endl;
     JsonFile file = JsonFile();
     file.fname = fpath;
     this->parse_fname(file);
     this->parse_metadata(file);
     file.find_number_of_subfiles();
     this->find_geometry(file);
-    
-
-
-
+    this->open_subfiles(file);
 
     return file;
 }
\ No newline at end of file
diff --git a/src/file_io/file_factory/JsonFileFactory.hpp b/src/file_io/file_factory/JsonFileFactory.hpp
index 42ef35d2..659594a3 100644
--- a/src/file_io/file_factory/JsonFileFactory.hpp
+++ b/src/file_io/file_factory/JsonFileFactory.hpp
@@ -8,6 +8,7 @@ class JsonFileFactory: public FileFactory
     File loadFile() override;
     void parse_metadata(File&) override;
     JsonFileFactory(std::filesystem::path fpath);
+    void open_subfiles(File&);
 
 
 };
diff --git a/src/main.cpp b/src/main.cpp
index e90319fa..a1d3820c 100644
--- a/src/main.cpp
+++ b/src/main.cpp
@@ -4,7 +4,7 @@
 
 
 int main() {
-    FileFactory fileFactory=FileFactory::getFactory(std::filesystem::current_path()/"test.json");
-
+    FileFactory fileFactory=FileFactory::getFactory(std::filesystem::path("/home/l_bechir/github/aare")/"data"/"m3_master_0.json");
+    std::cout<<"filefactory is of instance: "<<typeid(fileFactory).name()<<std::endl;
     File f = fileFactory.loadFile();
 }
diff --git a/test b/test
deleted file mode 100644
index e69de29b..00000000