diff --git a/build.py b/build.py
new file mode 100644
index 0000000..e69de29
diff --git a/pyproject.toml b/pyproject.toml
index 14766f6..634c110 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -123,6 +123,7 @@ exclude_also = [
 
 [tool.coverage.html]
 directory = "reports/coverage"
+
 [dependency-groups]
 dev = [
     "cython>=3.0.10",
diff --git a/scripts/pre_test_examples.py b/scripts/pre_test_examples.py
index 5416035..ca3f76e 100644
--- a/scripts/pre_test_examples.py
+++ b/scripts/pre_test_examples.py
@@ -4,7 +4,7 @@ from lang_main.constants import (
     INPUT_PATH_FOLDER,
     PATH_TO_DATASET,
     SAVE_PATH_FOLDER,
-    input_path_conf,
+    input_path_cfg,
 )
 
 print(SAVE_PATH_FOLDER, '\n')
@@ -12,4 +12,4 @@ print(INPUT_PATH_FOLDER, '\n')
 print(PATH_TO_DATASET, '\n')
 
 print('------------------------')
-print(Path.cwd(), '\n', input_path_conf)
+print(Path.cwd(), '\n', input_path_cfg)
diff --git a/src/lang_main/__init__.py b/src/lang_main/__init__.py
index 0fd67a0..90e2f84 100644
--- a/src/lang_main/__init__.py
+++ b/src/lang_main/__init__.py
@@ -6,7 +6,6 @@ from lang_main.config import (
     CONFIG_FILENAME,
     CYTO_STYLESHEET_FILENAME,
     PKG_DIR,
-    PREFER_INTERNAL_CONFIG,
     STOP_FOLDER,
     get_config_paths,
     load_cfg,
@@ -23,13 +22,19 @@ CONFIG: Final[dict[str, Any]] = load_cfg(
     starting_path=PKG_DIR,
     glob_pattern=CONFIG_FILENAME,
     stop_folder_name=STOP_FOLDER,
-    cfg_path_internal=cfg_path_internal,
-    prefer_internal_config=PREFER_INTERNAL_CONFIG,
 )
-base_parent_path = search_base_path(PKG_DIR, stop_folder_name=BASE_FOLDERNAME)
-if base_parent_path is None:
-    raise FileNotFoundError('Could not resolve base path of library')
-BASE_PATH: Final[Path] = base_parent_path
+
+lib_path = search_base_path(PKG_DIR, stop_folder_name=STOP_FOLDER)
+if lib_path is None:
+    raise FileNotFoundError('Could not resolve library path of application')
+LIB_PATH: Final[Path] = lib_path
+print(f'Library path is: {LIB_PATH}', flush=True)
+
+root_path = search_base_path(PKG_DIR, stop_folder_name=BASE_FOLDERNAME)
+if root_path is None:
+    raise FileNotFoundError('Could not resolve root path of application')
+ROOT_PATH: Final[Path] = root_path
+print(f'Root path is: {ROOT_PATH}', flush=True)
 
 
 # ** Cytoscape configuration
diff --git a/src/lang_main/config.py b/src/lang_main/config.py
index afcb819..845d1cd 100644
--- a/src/lang_main/config.py
+++ b/src/lang_main/config.py
@@ -2,11 +2,13 @@ from __future__ import annotations
 
 import logging
 import os
-import sys
 import tomllib
 from pathlib import Path
 from typing import Any, Final
 
+from lang_main.errors import LangMainConfigNotFoundError
+
+# from lang_main.loggers import logger_config as logger
 from lang_main.search import search_cwd, search_iterative
 
 _has_py4cyto: bool = True
@@ -29,10 +31,10 @@ if _has_py4cyto:
     p4c.py4cytoscape_logger.detail_logger.addHandler(logging.NullHandler())
 
 # ** lang-main config
-BASE_FOLDERNAME: Final[str] = 'lang-main'
+# ENV variable: LANG_MAIN_BASE_FOLDERNAME
+BASE_FOLDERNAME: Final[str] = os.environ.get('LANG_MAIN_BASE_FOLDERNAME', 'lang-main')
 CONFIG_FILENAME: Final[str] = 'lang_main_config.toml'
 CYTO_STYLESHEET_FILENAME: Final[str] = r'cytoscape_config/lang_main.xml'
-PREFER_INTERNAL_CONFIG: Final[bool] = False
 PKG_DIR: Final[Path] = Path(__file__).parent
 STOP_FOLDER: Final[str] = 'python'
 
@@ -42,7 +44,7 @@ def load_toml_config(
 ) -> dict[str, Any]:
     with open(path_to_toml, 'rb') as f:
         data = tomllib.load(f)
-    print('Loaded TOML config file successfully.', file=sys.stderr, flush=True)
+    print('Loaded TOML config file successfully.', flush=True)
 
     return data
 
@@ -63,26 +65,54 @@ def load_cfg(
     starting_path: Path,
     glob_pattern: str,
     stop_folder_name: str | None,
-    cfg_path_internal: Path,
-    prefer_internal_config: bool = False,
 ) -> dict[str, Any]:
-    cfg_path: Path | None
-    # look for external config first, if not found use internal one
-    if prefer_internal_config:
-        cfg_path = cfg_path_internal
-    else:
-        cfg_path = search_cwd(glob_pattern)
+    """Look for configuration file. Internal configs are not used any more because
+    the library behaviour is only guaranteed by external configurations.
 
-        if cfg_path is None:
-            cfg_path = search_iterative(
-                starting_path=starting_path,
-                glob_pattern=glob_pattern,
-                stop_folder_name=stop_folder_name,
-            )
-        # backup: use internal config
-        if cfg_path is None:
-            cfg_path = cfg_path_internal
+    Parameters
+    ----------
+    starting_path : Path
+        path to start for the lookup
+    glob_pattern : str
+        pattern of the config file naming scheme
+    stop_folder_name : str | None
+        folder name at which the lookup should stop, the parent folder
+        is also searched, e.g.
+        if starting_path is path/to/start/folder and stop_folder_name is 'to',
+        then path/ is also searched
+
+    Returns
+    -------
+    dict[str, Any]
+        loaded config file
+
+    Raises
+    ------
+    LangMainConfigNotFoundError
+        if no config file was found
+    """
+    cfg_path: Path | None
+    print('Looking for cfg file in CWD.', flush=True)
+    cfg_path = search_cwd(glob_pattern)
+
+    if cfg_path is None:
+        print(
+            (
+                f'Looking iteratively for config file. Start: {starting_path}, '
+                f'stop folder: {stop_folder_name}'
+            ),
+            flush=True,
+        )
+        cfg_path = search_iterative(
+            starting_path=starting_path,
+            glob_pattern=glob_pattern,
+            stop_folder_name=stop_folder_name,
+        )
+
+    if cfg_path is None:
+        raise LangMainConfigNotFoundError('Config file was not found.')
 
     config = load_toml_config(path_to_toml=cfg_path)
+    print(f'Loaded config from: >>{cfg_path}<<')
 
     return config.copy()
diff --git a/src/lang_main/constants.py b/src/lang_main/constants.py
index 1f604a8..5ce4001 100644
--- a/src/lang_main/constants.py
+++ b/src/lang_main/constants.py
@@ -6,7 +6,11 @@ import os
 
 from sentence_transformers import SimilarityFunction
 
-from lang_main import CONFIG, CYTO_PATH_STYLESHEET, BASE_PATH
+from lang_main import (
+    CONFIG,
+    CYTO_PATH_STYLESHEET,
+    LIB_PATH,
+)
 from lang_main.types import (
     CytoLayoutProperties,
     CytoLayouts,
@@ -47,15 +51,18 @@ LOGGING_DEFAULT_GRAPHS: Final[bool] = False
 PICKLE_PROTOCOL_VERSION: Final[int] = 5
 
 # ** paths
-input_path_conf = Path.cwd() / Path(CONFIG['paths']['inputs'])
-INPUT_PATH_FOLDER: Final[Path] = input_path_conf.resolve()
+# config placed in library path of application (usually "bin")
+input_path_cfg = LIB_PATH / Path(CONFIG['paths']['inputs'])
+INPUT_PATH_FOLDER: Final[Path] = input_path_cfg.resolve()
 # TODO reactivate later
-# if not INPUT_PATH_FOLDER.exists():
-#     raise FileNotFoundError(f'Input path >>{INPUT_PATH_FOLDER}<< does not exist.')
-save_path_conf = Path.cwd() / Path(CONFIG['paths']['results'])
-SAVE_PATH_FOLDER: Final[Path] = save_path_conf.resolve()
-path_dataset_conf = Path.cwd() / Path(CONFIG['paths']['dataset'])
-PATH_TO_DATASET: Final[Path] = path_dataset_conf.resolve()
+if not INPUT_PATH_FOLDER.exists():
+    raise FileNotFoundError(f'Input path >>{INPUT_PATH_FOLDER}<< does not exist.')
+save_path_cfg = LIB_PATH / Path(CONFIG['paths']['results'])
+SAVE_PATH_FOLDER: Final[Path] = save_path_cfg.resolve()
+if not SAVE_PATH_FOLDER.exists():
+    raise FileNotFoundError(f'Output path >>{SAVE_PATH_FOLDER}<< does not exist.')
+path_dataset_cfg = LIB_PATH / Path(CONFIG['paths']['dataset'])
+PATH_TO_DATASET: Final[Path] = path_dataset_cfg.resolve()
 # if not PATH_TO_DATASET.exists():
 #     raise FileNotFoundError(f'Dataset path >>{PATH_TO_DATASET}<< does not exist.')
 # ** control
@@ -69,12 +76,13 @@ SKIP_TIME_ANALYSIS: Final[bool] = CONFIG['control']['time_analysis_skip']
 
 # ** models
 # ** loading
-MODEL_BASE_FOLDER_NAME: Final[str] = 'lang-models'
-MODEL_BASE_FOLDER: Final[Path] = BASE_PATH / MODEL_BASE_FOLDER_NAME
+# MODEL_BASE_FOLDER_NAME: Final[str] = 'lang-models'
+model_folder_cfg = LIB_PATH / Path(CONFIG['paths']['models'])
+MODEL_BASE_FOLDER: Final[Path] = model_folder_cfg.resolve()
 if not MODEL_BASE_FOLDER.exists():
     raise FileNotFoundError('Language model folder not found.')
 os.environ['SENTENCE_TRANSFORMERS_HOME'] = str(MODEL_BASE_FOLDER)
-SPACY_MODEL_NAME: Final[SpacyModelTypes] = SpacyModelTypes.DE_DEP_NEWS_TRF
+SPACY_MODEL_NAME: Final[SpacyModelTypes] = SpacyModelTypes.DE_CORE_NEWS_SM
 STFR_MODEL_NAME: Final[STFRModelTypes] = STFRModelTypes.ALL_MPNET_BASE_V2
 STFR_DEVICE: Final[STFRDeviceTypes] = STFRDeviceTypes.CPU
 STFR_SIMILARITY: Final[SimilarityFunction] = SimilarityFunction.COSINE
diff --git a/src/lang_main/errors.py b/src/lang_main/errors.py
index 36625db..c544674 100644
--- a/src/lang_main/errors.py
+++ b/src/lang_main/errors.py
@@ -1,4 +1,8 @@
 # ** meta exceptions
+class LangMainConfigNotFoundError(Exception):
+    """Error raised if a config file could not be found successfully"""
+
+
 class LanguageModelNotFoundError(Exception):
     """Error raised if a given language model could not be loaded successfully"""
 
diff --git a/src/lang_main/lang_main_config.toml b/src/lang_main/lang_main_config.toml
index 729e8b8..b77c206 100644
--- a/src/lang_main/lang_main_config.toml
+++ b/src/lang_main/lang_main_config.toml
@@ -3,11 +3,12 @@
 pkg = 'lang_main_internal'
 
 [paths]
-inputs = './inputs/'
+inputs = './data/in/'
 # results = './results/dummy_N_1000/'
 # dataset = '../data/Dummy_Dataset_N_1000.csv'
-results = './results/test_20240807/'
+results = './data/out/'
 dataset = '../data/02_202307/Export4.csv'
+models = '../../lang-models'
 
 [logging]
 enabled = true
@@ -17,11 +18,11 @@ file = true
 # only debugging features, production-ready pipelines should always
 # be fully executed
 [control]
-preprocessing_skip = true
+preprocessing_skip = false
 token_analysis_skip = false
 graph_postprocessing_skip = false
 graph_rescaling_skip = false
-graph_static_rendering_skip = false
+graph_static_rendering_skip = true
 time_analysis_skip = true
 
 [preprocess]
diff --git a/src/lang_main/lang_main_config_old.toml b/src/lang_main/lang_main_config_old.toml
deleted file mode 100644
index ef7dbbc..0000000
--- a/src/lang_main/lang_main_config_old.toml
+++ /dev/null
@@ -1,57 +0,0 @@
-# lang_main: Config file
-
-[paths]
-inputs = './inputs/'
-results = './results/test_new2/'
-dataset = './01_2_Rohdaten_neu/Export4.csv'
-#results = './results/Export7/'
-#dataset = './01_03_Rohdaten_202403/Export7_59499_Zeilen.csv'
-#results = './results/Export7_trunc/'
-#dataset = './01_03_Rohdaten_202403/Export7_trunc.csv'
-
-# only debugging features, production-ready pipelines should always
-# be fully executed
-[control]
-preprocessing_skip = false
-token_analysis_skip = false
-graph_postprocessing_skip = false
-time_analysis_skip = false
-
-#[export_filenames]
-#filename_cossim_filter_candidates = 'CosSim-FilterCandidates'
-
-[preprocess]
-filename_cossim_filter_candidates = 'CosSim-FilterCandidates'
-date_cols = [
-    "VorgangsDatum", 
-    "ErledigungsDatum", 
-    "Arbeitsbeginn", 
-    "ErstellungsDatum",
-]
-threshold_amount_characters = 5
-threshold_similarity = 0.8
-
-[graph_postprocessing]
-threshold_edge_weight = 150
-
-[time_analysis.uniqueness]
-threshold_unique_texts = 4
-criterion_feature = 'HObjektText'
-feature_name_obj_id = 'ObjektID'
-
-[time_analysis.model_input]
-# input_features = [
-#     'VorgangsTypName',
-#     'VorgangsArtText',
-#     'VorgangsBeschreibung',
-# ]
-input_features = [
-    'VorgangsBeschreibung',
-]
-activity_feature = 'VorgangsTypName'
-activity_types = [
-    'Reparaturauftrag (Portal)',
-    'Störungsmeldung',
-]
-threshold_num_acitivities = 1
-threshold_similarity = 0.8
\ No newline at end of file
diff --git a/src/lang_main/loggers.py b/src/lang_main/loggers.py
index 739a0a5..35a575b 100644
--- a/src/lang_main/loggers.py
+++ b/src/lang_main/loggers.py
@@ -4,8 +4,8 @@ from pathlib import Path
 from time import gmtime
 from typing import Final
 
+from lang_main import LIB_PATH
 from lang_main.constants import (
-    BASE_PATH,
     ENABLE_LOGGING,
     LOGGING_TO_FILE,
     LOGGING_TO_STDERR,
@@ -16,11 +16,13 @@ from lang_main.types import LoggingLevels
 logging.Formatter.converter = gmtime
 LOG_FMT: Final[str] = '%(asctime)s | lang_main:%(module)s:%(levelname)s | %(message)s'
 LOG_DATE_FMT: Final[str] = '%Y-%m-%d %H:%M:%S +0000'
-LOG_FILE_FOLDER: Final[Path] = BASE_PATH / 'logs'
+LOG_FILE_FOLDER: Final[Path] = LIB_PATH / 'logs'
 if not LOG_FILE_FOLDER.exists():
     LOG_FILE_FOLDER.mkdir(parents=True)
 
 LOG_FILE_PATH: Final[Path] = LOG_FILE_FOLDER / 'lang-main.log'
+LOGGING_LEVEL_STDERR: Final[LoggingLevels] = LoggingLevels.INFO
+LOGGING_LEVEL_FILE: Final[LoggingLevels] = LoggingLevels.DEBUG
 
 # ** formatters
 logger_all_formater = logging.Formatter(fmt=LOG_FMT, datefmt=LOG_DATE_FMT)
@@ -29,7 +31,7 @@ logger_all_formater = logging.Formatter(fmt=LOG_FMT, datefmt=LOG_DATE_FMT)
 null_handler = logging.NullHandler()
 if ENABLE_LOGGING and LOGGING_TO_STDERR:
     logger_all_handler_stderr = logging.StreamHandler()
-    logger_all_handler_stderr.setLevel(LoggingLevels.WARNING)
+    logger_all_handler_stderr.setLevel(LOGGING_LEVEL_STDERR)
     logger_all_handler_stderr.setFormatter(logger_all_formater)
 else:
     logger_all_handler_stderr = null_handler
@@ -41,14 +43,13 @@ if ENABLE_LOGGING and LOGGING_TO_FILE:
         maxBytes=5_242_880,
         backupCount=1,
     )
-    logger_all_handler_file.setLevel(LoggingLevels.DEBUG)
+    logger_all_handler_file.setLevel(LOGGING_LEVEL_FILE)
     logger_all_handler_file.setFormatter(logger_all_formater)
 else:
     logger_all_handler_file = null_handler
 
 
 # ** logging levels
-LOGGING_LEVEL_ALL: Final[LoggingLevels] = LoggingLevels.DEBUG
 LOGGING_LEVEL_PREPROCESS: Final[LoggingLevels] = LoggingLevels.DEBUG
 LOGGING_LEVEL_PIPELINES: Final[LoggingLevels] = LoggingLevels.DEBUG
 LOGGING_LEVEL_GRAPHS: Final[LoggingLevels] = LoggingLevels.DEBUG
@@ -56,12 +57,15 @@ LOGGING_LEVEL_TIMELINE: Final[LoggingLevels] = LoggingLevels.DEBUG
 LOGGING_LEVEL_TOKEN_ANALYSIS: Final[LoggingLevels] = LoggingLevels.DEBUG
 LOGGING_LEVEL_SHARED_HELPERS: Final[LoggingLevels] = LoggingLevels.DEBUG
 LOGGING_LEVEL_RENDERING: Final[LoggingLevels] = LoggingLevels.DEBUG
+LOGGING_LEVEL_CONFIG: Final[LoggingLevels] = LoggingLevels.DEBUG
 
 # ** loggers and configuration
 logger_all = logging.getLogger('lang_main')
 logger_all.addHandler(logger_all_handler_stderr)
 logger_all.addHandler(logger_all_handler_file)
 
+logger_config = logging.getLogger('lang_main.config')
+logger_config.setLevel(LOGGING_LEVEL_CONFIG)
 logger_shared_helpers = logging.getLogger('lang_main.shared')
 logger_shared_helpers.setLevel(LOGGING_LEVEL_SHARED_HELPERS)
 logger_preprocess = logging.getLogger('lang_main.analysis.preprocessing')
diff --git a/tests/test_lang_main_init.py b/tests/test_lang_main_init.py
index 7456053..474088f 100644
--- a/tests/test_lang_main_init.py
+++ b/tests/test_lang_main_init.py
@@ -1,5 +1,5 @@
-from lang_main import BASE_PATH
+from lang_main import ROOT_PATH
 
 
 def test_base_path():
-    assert BASE_PATH is not None
+    assert ROOT_PATH is not None