diff --git a/src/tools/chip-cert/dacs.py b/src/tools/chip-cert/dacs.py
old mode 100644
new mode 100755
index 47a898b723eafc..526e338b5131ec
--- a/src/tools/chip-cert/dacs.py
+++ b/src/tools/chip-cert/dacs.py
@@ -1,4 +1,7 @@
+#!/usr/bin/env python
+
 import argparse
+import os
 import subprocess
 import sys
 import typing
@@ -113,6 +116,9 @@ def __init__(self, cert_type: CertType, dev_dir: str, test_dir: str, chip_cert_d
         self.cert_type = cert_type
         self.chipcert = chip_cert_dir + 'chip-cert'
 
+        if not os.path.exists(self.chipcert):
+            raise Exception('Path not found: %s' % self.chipcert)
+
         paa = Names(CertType.PAA, test_dir, dev_dir, pid)
         pai = Names(CertType.PAI, test_dir, dev_dir, pid)
         dac = Names(CertType.DAC, test_dir, dev_dir, pid)