diff --git a/common/source/java/ch/systemsx/cisd/common/exceptions/MasqueradingException.java b/common/source/java/ch/systemsx/cisd/common/exceptions/MasqueradingException.java
index b554694305828943a65eb94235072dc78f462b2b..c9402fee69e936e3e6022901425ee7ae79438c5d 100644
--- a/common/source/java/ch/systemsx/cisd/common/exceptions/MasqueradingException.java
+++ b/common/source/java/ch/systemsx/cisd/common/exceptions/MasqueradingException.java
@@ -66,7 +66,6 @@ public final class MasqueradingException extends RuntimeException
     @Override
     public final String toString()
     {
-        System.err.println("Prefix is " + prefix);
         final String s = prefix + " [" + rootExceptionClassName + "]";
         final String message = getMessage();
         return (message != null) ? (s + ": " + message) : s;