diff --git a/cscripts/csresmap.py b/cscripts/csresmap.py
index 806c2bd..3136ee3 100755
--- a/cscripts/csresmap.py
+++ b/cscripts/csresmap.py
@@ -107,15 +107,18 @@ class csresmap(ctools.cscript):
             if not self._skip_binning:
                 self['xref'].real()
                 self['yref'].real()
-                self['emin'].real()
-                self['emax'].real()
-                self['enumbins'].integer()
-                self['ebinalg'].string()
                 self['coordsys'].string()
                 self['proj'].string()
                 self['nxpix'].integer()
                 self['nypix'].integer()
                 self['binsz'].real()
+                self['ebinalg'].string()
+                if self['ebinalg'].string() == "FILE":
+                    self['ebinfile'].filename()
+                else:
+                    self['emin'].real()
+                    self['emax'].real()
+                    self['enumbins'].integer()
                 
         # Query parameters
         self['edisp'].boolean()
@@ -178,17 +181,20 @@ class csresmap(ctools.cscript):
 
                 # Create countsmap
                 bin = ctools.ctbin(self._obs)
-                bin['nxpix']    = self['nxpix'].integer()
-                bin['nypix']    = self['nypix'].integer()
-                bin['proj']     = self['proj'].string()
-                bin['coordsys'] = self['coordsys'].string()
                 bin['xref']     = self['xref'].real()
                 bin['yref']     = self['yref'].real()
-                bin['enumbins'] = self['enumbins'].integer()
+                bin['proj']     = self['proj'].string()
+                bin['coordsys'] = self['coordsys'].string()
                 bin['ebinalg']  = self['ebinalg'].string()
-                bin['emin']     = self['emin'].real()
-                bin['emax']     = self['emax'].real()
+                bin['nxpix']    = self['nxpix'].integer()
+                bin['nypix']    = self['nypix'].integer()
                 bin['binsz']    = self['binsz'].real()
+                if self['ebinalg'].string() == "FILE":
+                    bin['ebinfile'] = self['ebinfile'].filename().file()
+                else:
+                    bin['enumbins'] = self['enumbins'].integer()
+                    bin['emin']     = self['emin'].real()
+                    bin['emax']     = self['emax'].real()
                 bin['chatter']  = self['chatter'].integer()
                 bin['clobber']  = self['clobber'].boolean()
                 bin['debug']    = self['debug'].boolean()