diff --git a/base/source/java/ch/systemsx/cisd/base/utilities/NativeLibraryUtilities.java b/base/source/java/ch/systemsx/cisd/base/utilities/NativeLibraryUtilities.java
index ffcb1012cbd4c2c66bb7da1535a2817ff1d2d30c..1321306cdaa1b26ef60aa9df9227cdfaf4e59f6f 100644
--- a/base/source/java/ch/systemsx/cisd/base/utilities/NativeLibraryUtilities.java
+++ b/base/source/java/ch/systemsx/cisd/base/utilities/NativeLibraryUtilities.java
@@ -86,6 +86,8 @@ public final class NativeLibraryUtilities
             }
         } else
         {
+            System.err.printf("Native library '%s' does not exist or is not readable.\n", linkLib
+                    .getAbsolutePath());
             return false;
         }
     }