diff --git a/cscripts/cslightcrv.par b/cscripts/cslightcrv.par
index 206fe05..f9e4210 100644
--- a/cscripts/cslightcrv.par
+++ b/cscripts/cslightcrv.par
@@ -16,7 +16,7 @@
 #
 # Input and output parameters
 #============================
-inobs,     f, h, events.fits,,, "Input event list, counts cube, or observation definition XML file"
+inobs,     f, a, events.fits,,, "Input event list, counts cube, or observation definition XML file"
 inmodel,   f, a, $CTOOLS/share/models/crab.xml,,, "Input model definition XML file"
 srcname,   s, a, Crab,,, "Source name"
 expcube,   f, a, NONE,,, "Input exposure cube file (only needed for stacked analysis)"
diff --git a/cscripts/cslightcrv.py b/cscripts/cslightcrv.py
index ac44d82..33a2bd6 100755
--- a/cscripts/cslightcrv.py
+++ b/cscripts/cslightcrv.py
@@ -534,7 +534,7 @@ class cslightcrv(ctools.cscript):
             select['rad']  = 'UNDEFINED'
             select['ra']   = 'UNDEFINED'
             select['dec']  = 'UNDEFINED'
-            select.run()  
+            select.run()
 
             # Retrieve observation
             obs = select.obs()
@@ -577,8 +577,8 @@ class cslightcrv(ctools.cscript):
 
             # Extract parameter values
             for par in pars:
-                result['values'][par]      = source.spectral()[par].value()
-                result['values']['e_'+par] = source.spectral()[par].error()
+                result['values'][par]      = source[par].value()
+                result['values']['e_'+par] = source[par].error()
 
             # Calculate upper limit (-1 if not computed)
             ulimit_value = self._compute_ulimit(like.obs())
@@ -596,9 +596,9 @@ class cslightcrv(ctools.cscript):
             self._log.header3('Results')
             pars = self._get_free_par_names()
             for par in pars:
-                value = source.spectral()[par].value()
-                error = source.spectral()[par].error()
-                unit  = source.spectral()[par].unit()
+                value = source[par].value()
+                error = source[par].error()
+                unit  = source[par].unit()
                 self._log_value(gammalib.NORMAL, par,
                                 str(value)+' +/- '+str(error)+' '+unit)
             if result['ulimit'] > 0.0: