diff --git a/java.source/src/org/netbeans/modules/java/source/usages/BuildArtifactMapperImpl.java b/java.source/src/org/netbeans/modules/java/source/usages/BuildArtifactMapperImpl.java
--- a/java.source/src/org/netbeans/modules/java/source/usages/BuildArtifactMapperImpl.java
+++ b/java.source/src/org/netbeans/modules/java/source/usages/BuildArtifactMapperImpl.java
@@ -303,6 +303,12 @@
             return null;
         }
 
+        File tagFile = new File(targetFolder, TAG_FILE_NAME);
+
+        if (!tagFile.exists()) {
+            return null;
+        }
+
         try {
             SourceUtils.waitScanFinished();
         } catch (InterruptedException e) {
@@ -311,12 +317,6 @@
             return false;
         }
 
-        File tagFile = new File(targetFolder, TAG_FILE_NAME);
-
-        if (!tagFile.exists()) {
-            return null;
-        }
-
         delete(targetFolder, false);
         delete(tagFile, true);