diff --git a/pkgmgr/exec_proxy_command.py b/pkgmgr/exec_proxy_command.py
index 65b37f0..fca35e1 100644
--- a/pkgmgr/exec_proxy_command.py
+++ b/pkgmgr/exec_proxy_command.py
@@ -2,14 +2,32 @@ import os
 from pkgmgr.get_repo_identifier import get_repo_identifier
 from pkgmgr.get_repo_dir import get_repo_dir
 from pkgmgr.run_command import run_command
+import sys
 
-def exec_proxy_command(proxy_prefix:str,selected_repos, repositories_base_dir, all_repos, proxy_command:str, extra_args, preview:bool):
+def exec_proxy_command(proxy_prefix: str, selected_repos, repositories_base_dir, all_repos, proxy_command: str, extra_args, preview: bool):
     """Execute a given proxy command with extra arguments for each repository."""
+    error_repos = []
+    max_exit_code = 0
+
     for repo in selected_repos:
         repo_identifier = get_repo_identifier(repo, all_repos)
-        repo_dir = get_repo_dir(repositories_base_dir,repo)
-        if os.path.exists(repo_dir):
-            full_cmd = f"{proxy_prefix} {proxy_command} {' '.join(extra_args)}"
+        repo_dir = get_repo_dir(repositories_base_dir, repo)
+
+        if not os.path.exists(repo_dir):
+            print(f"Repository directory '{repo_dir}' not found for {repo_identifier}.")
+            continue
+
+        full_cmd = f"{proxy_prefix} {proxy_command} {' '.join(extra_args)}"
+
+        try:
             run_command(full_cmd, cwd=repo_dir, preview=preview)
-        else:
-            print(f"Repository directory '{repo_dir}' not found for {repo_identifier}.")
\ No newline at end of file
+        except SystemExit as e:
+            print(f"[ERROR] Command failed in {repo_identifier} with exit code {e.code}.")
+            error_repos.append((repo_identifier, e.code))
+            max_exit_code = max(max_exit_code, e.code)
+
+    if error_repos:
+        print("\nSummary of failed commands:")
+        for repo_identifier, exit_code in error_repos:
+            print(f"- {repo_identifier} failed with exit code {exit_code}")
+        sys.exit(max_exit_code)
\ No newline at end of file