1 files changed, 8 insertions, 1 deletions

diff --git a/unit_trace/gedf_test.py b/unit_trace/gedf_test.py
index f3088ac..cf66142 100644
--- a/unit_trace/gedf_test.py
+++ b/unit_trace/gedf_test.py
@@ -9,6 +9,7 @@
 ###############################################################################
 
 import copy
+import sys
 
 
 ###############################################################################
@@ -58,7 +59,13 @@ def gedf_test(stream):
         # Move a Job from the eligible queue to on_cpu
         elif record.type_name == 'switch_to':
             pos = _find_job(record,eligible)
-            job = eligible[pos]
+            try:
+                job = eligible[pos]
+            except TypeError:
+                msg = "Event %d tried to switch to a job that was not eligible\n"
+                msg = msg % (record.id)
+                sys.stderr.write(msg)
+                exit()
             del eligible[pos]
             on_cpu.append(job)