diff --git a/src/main/java/eva2/OptimizerFactory.java b/src/main/java/eva2/OptimizerFactory.java
index 82a1d116..09c1c7c2 100644
--- a/src/main/java/eva2/OptimizerFactory.java
+++ b/src/main/java/eva2/OptimizerFactory.java
@@ -782,7 +782,7 @@ public class OptimizerFactory {
         if (runnable == null) {
             return null;
         }
-        new Thread(runnable).start();
+        new Thread(runnable).run();
         lastRunnable = runnable;
         return runnable;
     }