diff --git a/heudiconv/heuristics/convertall.py b/heudiconv/heuristics/convertall.py
index 6187b344..4ed125d8 100644
--- a/heudiconv/heuristics/convertall.py
+++ b/heudiconv/heuristics/convertall.py
@@ -1,5 +1,8 @@
+import logging
 import os
 
+lgr = logging.getLogger('heudiconv')
+
 
 def create_key(template, outtype=('nii.gz',), annotation_classes=None):
     if template is None or not template:
@@ -16,6 +19,7 @@ def custom_seqinfo(series_files, wrapper, **kw):
     try:
         affine = wrapper.affine.tostring()
     except WrapperError:
+        lgr.exception("Errored out while obtaining/converting affine")
         affine = None
     return affine, series_files[0]