diff --git a/presg.py b/presg.py
index 47309aa..566b631 100644
--- a/presg.py
+++ b/presg.py
@@ -2,6 +2,7 @@
 import sys
 import subprocess as sbp
 import numpy as np
+import traceback as tb
 import xml.etree.ElementTree as et
 import msgpi.sg as sgm
 import msgpi.io.iosc as miosc
@@ -303,7 +304,8 @@ def preSG(sg_xml, analysis, solver='swiftcomp', write_input=True, scrnout=True):
             sbp.call(cmd, stdout=FNULL, stderr=sbp.STDOUT)
             return fn_sg_in, smdim
         except:
-            e = sys.exc_info()[0]
+            # e = sys.exc_info()[0]
+            e = tb.format_exc()
             print('[ERROR] ', e)
             return
     else: