diff --git a/src/main/java/org/bsc/maven/plugin/processor/AbstractAnnotationProcessorMojo.java b/src/main/java/org/bsc/maven/plugin/processor/AbstractAnnotationProcessorMojo.java
index 3b70728..cc420d0 100644
--- a/src/main/java/org/bsc/maven/plugin/processor/AbstractAnnotationProcessorMojo.java
+++ b/src/main/java/org/bsc/maven/plugin/processor/AbstractAnnotationProcessorMojo.java
@@ -534,6 +534,7 @@ public void execute(Artifact artifact) {
                     
                 } catch (Exception ex) {
                     getLog().warn(String.format("Problem reading source archive [%s]", artifact.getFile().getPath()));
+                    getLog().debug(ex);
                 }
             }
         });