diff --git a/toplev.py b/toplev.py
index fe928fd9..3291021d 100755
--- a/toplev.py
+++ b/toplev.py
@@ -4028,7 +4028,10 @@ def runner_emaps():
         runner.ectx.emap = ocperf.find_emap(pmu=runner.pmu if runner.pmu else "cpu")
         runner.printer.emap = ectx.emap
         if not runner.ectx.emap:
-            sys.exit("Unknown CPU or CPU event map not found.")
+            os.environ["OCVERBOSE"] = "1"
+            ocperf.find_emap()
+            sys.exit("Unknown CPU or CPU event map not found (EVENTMAP:%s, model:%d)" %
+                     (os.environ["EVENTMAP"] if "EVENTMAP" in os.environ else "", cpu.mode))
         if version:
             version += ", "
         version += model_setup(runner, cpu.cpu)