diff --git a/cli/runners/all_pairs_cflr_tool_runner.py b/cli/runners/all_pairs_cflr_tool_runner.py
index 53a8a68..b3dd460 100644
--- a/cli/runners/all_pairs_cflr_tool_runner.py
+++ b/cli/runners/all_pairs_cflr_tool_runner.py
@@ -67,6 +67,7 @@ def run(self) -> CflrToolRunResult:
             cwd=self.work_dir,
             stdout=subprocess.PIPE,
             text=True,
+            check=True
         )
         return self.safe_parse_results(process)
 
diff --git a/cli/runners/gigascale_algo_all_pairs_cflr_tool_runner.py b/cli/runners/gigascale_algo_all_pairs_cflr_tool_runner.py
index d0d01ed..8bc7795 100644
--- a/cli/runners/gigascale_algo_all_pairs_cflr_tool_runner.py
+++ b/cli/runners/gigascale_algo_all_pairs_cflr_tool_runner.py
@@ -37,6 +37,7 @@ def run(self) -> CflrToolRunResult:
             cwd=self.work_dir,
             stdout=subprocess.PIPE,
             text=True,
+            check=True,
             input=
             f"""
             set timeout -1