diff --git a/library/basic_caption_gui.py b/library/basic_caption_gui.py
index 550d757..57ff558 100644
--- a/library/basic_caption_gui.py
+++ b/library/basic_caption_gui.py
@@ -16,6 +16,10 @@ def caption_images(
     if images_dir_input == '':
         msgbox('Image folder is missing...')
         return
+    
+    if caption_file_ext == '':
+        msgbox('Please provide an extension for the caption files.')
+        return
 
     if not caption_text_input == '':
         print(
@@ -83,7 +87,8 @@ def gradio_basic_caption_gui_tab():
             )
             caption_file_ext = gr.Textbox(
                 label='Caption file extension',
-                placeholder='(Optional) Default: .caption',
+                placeholder='Extention for caption file. eg: .caption, .txt',
+                value='.txt',
                 interactive=True,
             )
             overwrite_input = gr.Checkbox(
diff --git a/library/blip_caption_gui.py b/library/blip_caption_gui.py
index aadb394..b9ae8ae 100644
--- a/library/blip_caption_gui.py
+++ b/library/blip_caption_gui.py
@@ -26,6 +26,10 @@ def caption_images(
     if train_data_dir == '':
         msgbox('Image folder is missing...')
         return
+    
+    if caption_file_ext == '':
+        msgbox('Please provide an extension for the caption files.')
+        return
 
     print(f'Captioning files in {train_data_dir}...')
     run_cmd = f'.\\venv\\Scripts\\python.exe "finetune/make_captions.py"'
@@ -82,7 +86,8 @@ def gradio_blip_caption_gui_tab():
         with gr.Row():
             caption_file_ext = gr.Textbox(
                 label='Caption file extension',
-                placeholder='(Optional) Default: .caption',
+                placeholder='Extention for caption file. eg: .caption, .txt',
+                value='.txt',
                 interactive=True,
             )
 
diff --git a/library/common_gui.py b/library/common_gui.py
index 7514854..fd2d83d 100644
--- a/library/common_gui.py
+++ b/library/common_gui.py
@@ -200,7 +200,7 @@ def find_replace(folder='', caption_file_ext='.caption', find='', replace=''):
 
     files = [f for f in os.listdir(folder) if f.endswith(caption_file_ext)]
     for file in files:
-        with open(os.path.join(folder, file), 'r') as f:
+        with open(os.path.join(folder, file), 'r', errors="ignore") as f:
             content = f.read()
             f.close
         content = content.replace(find, replace)
diff --git a/library/wd14_caption_gui.py b/library/wd14_caption_gui.py
index 13645ce..d50c32a 100644
--- a/library/wd14_caption_gui.py
+++ b/library/wd14_caption_gui.py
@@ -14,6 +14,10 @@ def caption_images(train_data_dir, caption_extension, batch_size, thresh):
     if train_data_dir == '':
         msgbox('Image folder is missing...')
         return
+    
+    if caption_extension == '':
+        msgbox('Please provide an extension for the caption files.')
+        return
 
     print(f'Captioning files in {train_data_dir}...')
     run_cmd = f'accelerate launch "./finetune/tag_images_by_wd14_tagger.py"'
@@ -56,7 +60,8 @@ def gradio_wd14_caption_gui_tab():
 
             caption_extension = gr.Textbox(
                 label='Caption file extension',
-                placeholder='(Optional) Default: .caption',
+                placeholder='Extention for caption file. eg: .caption, .txt',
+                value='.txt',
                 interactive=True,
             )
             thresh = gr.Number(value=0.35, label='Threshold')
diff --git a/lora_gui.py b/lora_gui.py
index d9b99fc..e35e193 100644
--- a/lora_gui.py
+++ b/lora_gui.py
@@ -267,6 +267,10 @@ def train_model(
     if output_dir == '':
         msgbox('Output folder path is missing')
         return
+    
+    if stop_text_encoder_training_pct > 0:
+        msgbox('Output "stop text encoder training" is not yet supported. Ignoring')
+        stop_text_encoder_training_pct = 0
 
     # If string is empty set string to 0.
     if text_encoder_lr == '':