diff --git a/common/realtime.py b/common/realtime.py
index 6b8587f..aad4baa 100644
--- a/common/realtime.py
+++ b/common/realtime.py
@@ -34,7 +34,10 @@ def set_realtime_priority(level: int) -> None:
 
 def set_core_affinity(cores: list[int]) -> None:
   if not PC:
-    os.sched_setaffinity(0, cores)
+    try:  # CLEARPILOT ....
+      os.sched_setaffinity(0, cores)
+    except:
+      nothing=0
 
 
 def config_realtime_process(cores: int | list[int], priority: int) -> None: