Print stack trace on conversion errors

Change-Id: I887cf7641e01936abe2e7d6b589c557565643725
diff --git a/nor2tei.py b/nor2tei.py
index 693ed4b..5c67bdc 100644
--- a/nor2tei.py
+++ b/nor2tei.py
@@ -1,7 +1,8 @@
 import os, sys
 import xml.etree.ElementTree as ET
 from xml.dom import minidom
-
+import traceback
+import sys
 
 def main():
     # Create corpus structure from string and save into file 
@@ -21,13 +22,15 @@
 
     # Process documents and append to corpus tree
     for j in range(1, len(sys.argv)):
-        try:
-            currentTree = convert(j-1, sys.argv[j])
-            currentRoot = currentTree.getroot()
-            corpusRoot.append(currentRoot)
-        except:
-            print(sys.argv[j])
-            continue
+      try:
+         currentTree = convert(j-1, sys.argv[j])
+         currentRoot = currentTree.getroot()
+         corpusRoot.append(currentRoot)
+      except:
+         print("ERROR:"+sys.argv[j])
+         print(traceback.format_exc())
+         print(sys.exc_info()[2])
+         continue
 
     # Indent and save tree
     ET.indent(corpusTree, "  ")