diff --git a/environment.yml b/environment.yml
index 8c367826..f5325f86 100644
--- a/environment.yml
+++ b/environment.yml
@@ -2,7 +2,7 @@ name: vai-lab-env
 channels:
   - conda-forge
 dependencies:
-  - python=3.7
+  - python=3.6
   - c-compiler
   - pandas
   - pillow
diff --git a/pyproject.toml b/pyproject.toml
index a399a614..7e1970cb 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -14,7 +14,7 @@ classifiers = [
     "License :: OSI Approved :: MIT License",
     'Programming Language :: Python :: 3.11'
 ]
-requires-python = ">=3.7"
+requires-python = ">=3.6"
 version = "0.0.dev4"
 description = "AI assisted Virtual Laboratory framework."
 
diff --git a/src/vai_lab/Core/vai_lab_core.py b/src/vai_lab/Core/vai_lab_core.py
index 56a9d8a4..48ac46a8 100644
--- a/src/vai_lab/Core/vai_lab_core.py
+++ b/src/vai_lab/Core/vai_lab_core.py
@@ -27,7 +27,7 @@ def _launch(self):
         gui_app = GUI()
         gui_app._debug = self._debug
         gui_app.set_avail_plugins(self._avail_plugins)
-        gui_app.set_gui_as_startpage() # FIXME
+        gui_app.set_gui_as_startpage()
         gui_output = gui_app.launch()
         if not self._debug:
             try:
diff --git a/src/vai_lab/GUI/GUI_core.py b/src/vai_lab/GUI/GUI_core.py
index 296f0334..0ebb5df4 100644
--- a/src/vai_lab/GUI/GUI_core.py
+++ b/src/vai_lab/GUI/GUI_core.py
@@ -47,7 +47,7 @@ def set_options(self, module_config):
 
     def set_gui_as_startpage(self):
         self._is_startpage = True
-        self._load_plugin("main") # FIXME
+        self._load_plugin("main")
         self.xml_handler = XML_handler()
         self.xml_handler.new_config_file()
         
@@ -80,7 +80,7 @@ def _add_UI_type_to_frames(self, ui_specs):
 
         plugin = import_plugin_absolute(globals(),
                                         ui_specs["_PLUGIN_PACKAGE"],
-                                        ui_specs["_PLUGIN_CLASS_NAME"]) # FIXME
+                                        ui_specs["_PLUGIN_CLASS_NAME"])
         self._desired_ui_types.append(plugin)
         self._compare_layer_priority(ui_specs)
         if ui_specs["_PLUGIN_MODULE_OPTIONS"]["required_children"] != None:
@@ -99,7 +99,7 @@ def _load_plugin(self, ui_type: list):
         for ui in ui_type:
             ui_specs = self._avail_plugins.find_from_readable_name(ui)           
             try:
-                self._add_UI_type_to_frames(ui_specs) # FIXME
+                self._add_UI_type_to_frames(ui_specs)
             except ModuleNotFoundError as ex:
                 from sys import exit
                 print(ex.msg)
diff --git a/src/vai_lab/_import_helper.py b/src/vai_lab/_import_helper.py
index 70e4d514..c8d3204b 100644
--- a/src/vai_lab/_import_helper.py
+++ b/src/vai_lab/_import_helper.py
@@ -9,26 +9,11 @@ def import_plugin(script_config, plugin_name):
     return plugin_class
 
 def import_plugin_absolute(script_config,plugin_package,plugin_name):
-    print("script_config:", script_config)
-    print()
-    print("plugin_package:", plugin_package)
-    print()
-    print("plugin_name:", plugin_name)
-
-    # FIXME
-    import traceback
-    try:
-        plugin_list = __import__(plugin_package,
-                                script_config,
-                                {},
-                                [plugin_name])
-    except Exception as err:
-        print("\n\nERROR >>>\n\n")
-        print(traceback.format_exc())
-        print("err:", err)
-        print("\n\n<<< ERROR\n\n")
+    plugin_list = __import__(plugin_package,
+                            script_config,
+                            {},
+                            [plugin_name])
         
-
     plugin_class = getattr(plugin_list, plugin_name)
     return plugin_class