diff --git a/Dockerfile b/Dockerfile
index 8390d79..6ec98b3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,17 +1,26 @@
 # Use the Epic Games UE runtime as base
 FROM ghcr.io/epicgames/unreal-engine:runtime
 
+USER root
+
 # Set working directory
 WORKDIR /app
 
 # Copy your packages into the container
 COPY Packages/ /app/Packages/
 
+RUN chown -R ue4:ue4 /app && \
+    chmod -R 755 /app && \
+    chmod +x /app/Packages/Manager/evolved-npcs && \
+    chmod u+w /app/Packages/ -R  # Add write permissions to Packages directory
+
 # Install any additional dependencies if needed
 # RUN apt-get update && apt-get install -y <your-packages>
 
 # Set any environment variables
 # ENV UE_PROJECT_ROOT=/app
 
+USER ue4
+
 # Default command (modify as needed)
 CMD ["/bin/bash"]
\ No newline at end of file
diff --git a/evolved-npcs/src/fighter_nn/mod.rs b/evolved-npcs/src/fighter_nn/mod.rs
index 3fa753a..9998af0 100644
--- a/evolved-npcs/src/fighter_nn/mod.rs
+++ b/evolved-npcs/src/fighter_nn/mod.rs
@@ -846,6 +846,12 @@ async fn run_1v1_simulation(
 
     trace!("Running simulation for {} vs {}", nn_1_id, nn_2_id);
 
+    // Validate  and log that executable path exists
+    if !Path::new(GAME_EXECUTABLE_PATH).exists() {
+        error!("Game executable not found at path: {}", GAME_EXECUTABLE_PATH);
+        return Err(anyhow!("Game executable not found at path: {}", GAME_EXECUTABLE_PATH).into());
+    }
+
     // let _output = if display_simulation {
     //     Command::new(GAME_EXECUTABLE_PATH)
     //         .arg(&config1_arg)