diff --git a/mkgui/app.py b/mkgui/app.py
index 0f77006..9487284 100644
--- a/mkgui/app.py
+++ b/mkgui/app.py
@@ -29,12 +29,20 @@ if os.path.isdir(AUDIO_SAMPLES_DIR):
 if os.path.isdir(SYN_MODELS_DIRT):    
     synthesizers =  Enum('synthesizers', list((file.name, file) for file in Path(SYN_MODELS_DIRT).glob("**/*.pt")))
     print("Loaded synthesizer models: " + str(len(synthesizers)))
+else:
+    raise Exception(f"Model folder {SYN_MODELS_DIRT} doesn't exist.")
+
 if os.path.isdir(ENC_MODELS_DIRT):    
     encoders =  Enum('encoders', list((file.name, file) for file in Path(ENC_MODELS_DIRT).glob("**/*.pt")))
     print("Loaded encoders models: " + str(len(encoders)))
+else:
+    raise Exception(f"Model folder {ENC_MODELS_DIRT} doesn't exist.")
+
 if os.path.isdir(VOC_MODELS_DIRT):    
     vocoders =  Enum('vocoders', list((file.name, file) for file in Path(VOC_MODELS_DIRT).glob("**/*gan*.pt")))
     print("Loaded vocoders models: " + str(len(synthesizers)))
+else:
+    raise Exception(f"Model folder {VOC_MODELS_DIRT} doesn't exist.")
 
 
 class Input(BaseModel):
diff --git a/mkgui/app_vc.py b/mkgui/app_vc.py
index 1f06b41..3e4c793 100644
--- a/mkgui/app_vc.py
+++ b/mkgui/app_vc.py
@@ -34,14 +34,20 @@ if os.path.isdir(AUDIO_SAMPLES_DIR):
 if os.path.isdir(EXT_MODELS_DIRT):    
     extractors =  Enum('extractors', list((file.name, file) for file in Path(EXT_MODELS_DIRT).glob("**/*.pt")))
     print("Loaded extractor models: " + str(len(extractors)))
+else:
+    raise Exception(f"Model folder {EXT_MODELS_DIRT} doesn't exist.")
+
 if os.path.isdir(CONV_MODELS_DIRT):    
     convertors =  Enum('convertors', list((file.name, file) for file in Path(CONV_MODELS_DIRT).glob("**/*.pth")))
     print("Loaded convertor models: " + str(len(convertors)))
+else:
+    raise Exception(f"Model folder {CONV_MODELS_DIRT} doesn't exist.")
 
 if os.path.isdir(VOC_MODELS_DIRT):    
     vocoders =  Enum('vocoders', list((file.name, file) for file in Path(VOC_MODELS_DIRT).glob("**/*gan*.pt")))
     print("Loaded vocoders models: " + str(len(vocoders)))
-
+else:
+    raise Exception(f"Model folder {VOC_MODELS_DIRT} doesn't exist.")
 
 class Input(BaseModel):
     local_audio_file: audio_input_selection = Field(
diff --git a/mkgui/preprocess.py b/mkgui/preprocess.py
index 0827add..9d41994 100644
--- a/mkgui/preprocess.py
+++ b/mkgui/preprocess.py
@@ -13,9 +13,14 @@ ENC_MODELS_DIRT = "encoder\\saved_models"
 if os.path.isdir(EXT_MODELS_DIRT):    
     extractors =  Enum('extractors', list((file.name, file) for file in Path(EXT_MODELS_DIRT).glob("**/*.pt")))
     print("Loaded extractor models: " + str(len(extractors)))
+else:
+    raise Exception(f"Model folder {EXT_MODELS_DIRT} doesn't exist.")
+
 if os.path.isdir(ENC_MODELS_DIRT):    
     encoders = Enum('encoders', list((file.name, file) for file in Path(ENC_MODELS_DIRT).glob("**/*.pt")))
     print("Loaded encoders models: " + str(len(encoders)))
+else:
+    raise Exception(f"Model folder {ENC_MODELS_DIRT} doesn't exist.")
 
 class Model(str, Enum):
     VC_PPG2MEL = "ppg2mel"
diff --git a/mkgui/train.py b/mkgui/train.py
index 02287d7..7b85ecc 100644
--- a/mkgui/train.py
+++ b/mkgui/train.py
@@ -18,12 +18,20 @@ ENC_MODELS_DIRT = "encoder\\saved_models"
 if os.path.isdir(EXT_MODELS_DIRT):    
     extractors =  Enum('extractors', list((file.name, file) for file in Path(EXT_MODELS_DIRT).glob("**/*.pt")))
     print("Loaded extractor models: " + str(len(extractors)))
+else:
+    raise Exception(f"Model folder {EXT_MODELS_DIRT} doesn't exist.")
+
 if os.path.isdir(CONV_MODELS_DIRT):    
     convertors =  Enum('convertors', list((file.name, file) for file in Path(CONV_MODELS_DIRT).glob("**/*.pth")))
     print("Loaded convertor models: " + str(len(convertors)))
+else:
+    raise Exception(f"Model folder {CONV_MODELS_DIRT} doesn't exist.")
+
 if os.path.isdir(ENC_MODELS_DIRT):    
     encoders = Enum('encoders', list((file.name, file) for file in Path(ENC_MODELS_DIRT).glob("**/*.pt")))
     print("Loaded encoders models: " + str(len(encoders)))
+else:
+    raise Exception(f"Model folder {ENC_MODELS_DIRT} doesn't exist.")
 
 class Model(str, Enum):
     VC_PPG2MEL = "ppg2mel"