diff --git a/slpkg/main.py b/slpkg/main.py
index 82a559d2..8e38753c 100644
--- a/slpkg/main.py
+++ b/slpkg/main.py
@@ -271,6 +271,7 @@ class Argparse(Configs):
         commands: list = []
         options: list = []
         invalid: list = []
+        error: int = 0
 
         for arg in self.args:
             if arg in self.options:
@@ -287,18 +288,21 @@ class Argparse(Configs):
 
         # Avoid to combine two or more options.
         if len(options) != len(set(options)):
-            print(f"{self.prog_name}: you added the same {', '.join(options)} options.")
-            self.usage.help_minimal()
+            print(f"{self.prog_name}: you added the same \'{', '.join(options)}\' options.")
+            error: int = 1
 
         # Avoid to combine two or more commands.
         if len(commands) > 1:
-            print(f"{self.prog_name}: you can't combine {', '.join(commands)} commands.")
-            self.usage.help_minimal()
+            print(f"{self.prog_name}: you can't combine \'{', '.join(commands)}\' commands.")
+            error: int = 1
 
         # Prints error for invalid options.
         if invalid:
             for opt in invalid:
                 print(f"{self.prog_name}: invalid option '{opt}'")
+            error: int = 1
+
+        if error:
             self.usage.help_minimal()
 
     def split_options(self) -> None: