diff --git a/src/simudator/core/modules/memory.py b/src/simudator/core/modules/memory.py
index 97a8690340985fa271f62a81d54595630712a597..d71774550dd0565f864d93d7261f4b64a7f6a6b2 100644
--- a/src/simudator/core/modules/memory.py
+++ b/src/simudator/core/modules/memory.py
@@ -31,7 +31,7 @@ class Memory(Module):
         self.output_s = output_signal
 
         # Internal state
-        self.memory = [0 for i in range(size)]
+        self.memory = [0 for _ in range(size)]
         self.current_adress = 0
         self.is_write = False
 
diff --git a/src/simudator/processor/mia/gui/mia_memory_graphic.py b/src/simudator/processor/mia/gui/mia_memory_graphic.py
index e3c314a88f855d411ec5a7f3b86716a656644519..9b7f2f62966fdd945b7331631f3526b008ef1f99 100644
--- a/src/simudator/processor/mia/gui/mia_memory_graphic.py
+++ b/src/simudator/processor/mia/gui/mia_memory_graphic.py
@@ -7,6 +7,7 @@ from qtpy.QtWidgets import (
     QTextEdit,
     QVBoxLayout,
     QWidget,
+    QErrorMessage,
 )
 
 from simudator.core.modules import Memory
@@ -57,6 +58,7 @@ class MiaMemoryGraphicsItem(MemoryGraphicsItem):
     def __init__(self, memory_module: Memory, **kwargs):
         super().__init__(memory_module, **kwargs)
         self.memory_window = None
+        self.errorMessageWidget = QErrorMessage()
 
     def draw_graphics_item(self) -> None:
         # Same as normal memory but no control signal
@@ -145,6 +147,12 @@ class MiaMemoryGraphicsItem(MemoryGraphicsItem):
             )
         else:
             module_state = self.module.get_state()
-            module_state['memory'][parsed_adress] = parsed_value
-            self.module.set_state(module_state)
-            self.update_graphics_signal.emit()
+            try:
+                module_state['memory'][parsed_adress] = parsed_value
+            except IndexError:
+                self.errorMessageWidget.showMessage(
+                    "Address entered was larger than memory space. Max address is 0xff"
+                )
+            else:
+                self.module.set_state(module_state)
+                self.update_graphics_signal.emit()