diff --git a/source/python/classes/ControlFile.py b/source/python/classes/ControlFile.py
index 3dfdc071ad2d9be0900fda95379ae6b179cfc9b1..d9475eea2cbed92fc52a5417f2bb588ed9678dd2 100644
--- a/source/python/classes/ControlFile.py
+++ b/source/python/classes/ControlFile.py
@@ -60,7 +60,7 @@ import inspect
 sys.path.append('../')
 import _config
 from mods.tools import my_error, silent_remove
-from mods.checks import check_grid, check_area, check_levels
+from mods.checks import check_grid, check_area, check_levels, check_purefc
 
 # ------------------------------------------------------------------------------
 # CLASS
diff --git a/source/python/classes/EcFlexpart.py b/source/python/classes/EcFlexpart.py
index cf3b7510ea1ce19bc78c7efb48d62db2a27317fe..7b66a26958dcda0ec48b0a3ad55a364c18551422 100644
--- a/source/python/classes/EcFlexpart.py
+++ b/source/python/classes/EcFlexpart.py
@@ -916,12 +916,10 @@ class EcFlexpart(object):
                         else:
                             t_enddate = t_date + timedelta(2*int(c.dtime))
 
-                            # squeeze out information of last two steps contained
-                            # in deac_vals[parId]
-                            # if step+int(c.dtime) == c.maxstep and c.purefc
-                            # or t_dt+timedelta(hours = int(c.dtime))
-                            # >= t_enddate:
-                            # Note that deac_vals[parId][0] has not been popped in this case
+                            # squeeze out information of last two steps
+                            # contained in deac_vals[parId]
+                            # Note that deac_vals[parId][0] has not been popped
+                            # in this case
 
                             if step == c.maxstep and c.purefc or \
                                t_dt == t_enddate: