Index: assignment-tool/tool/src/java/org/sakaiproject/assignment/tool/AssignmentAction.java
===================================================================
--- assignment-tool/tool/src/java/org/sakaiproject/assignment/tool/AssignmentAction.java	(revision 37706)
+++ assignment-tool/tool/src/java/org/sakaiproject/assignment/tool/AssignmentAction.java	(working copy)
@@ -9910,8 +9910,7 @@
 			
 			byte[] buffer = new byte[4096];
 			
-			File f = new File(fName);
-			f.getParentFile().mkdirs();
+			File f = File.createTempFile("asgnup", "tmp"); 
 			
 			FileOutputStream fout = new FileOutputStream(f);
 			int len;
@@ -9929,6 +9928,7 @@
 			fc.read(bb);
 			
 			//remove the file
+			fc.close(); // The file channel needs to be closed before the deletion.
 			f.delete();
 			
 			return data;