diff --git a/doc/source/reference_manual/ctulimit.rst b/doc/source/reference_manual/ctulimit.rst
index 170dc03..55d0d62 100644
--- a/doc/source/reference_manual/ctulimit.rst
+++ b/doc/source/reference_manual/ctulimit.rst
@@ -9,8 +9,7 @@ Computes upper limit for a specific sky model component.
 Synopsis
 --------
 
-Computes the upper limit flux of a given source and stores the value
-in an ASCII file.
+Computes the upper limit flux of a given source.
 
 
 General parameters
@@ -37,9 +36,6 @@ General parameters
 ``irf [string]``
     Instrumental response function.
  	 	 
-``outfile [file]``
-    Output ASCII file name.
-
 ``(confidence = 0.95) [real]``
     Confidence Level of upper limit.
     
diff --git a/src/ctulimit/ctulimit.cpp b/src/ctulimit/ctulimit.cpp
index 44e3d50..30abc35 100644
--- a/src/ctulimit/ctulimit.cpp
+++ b/src/ctulimit/ctulimit.cpp
@@ -337,7 +337,10 @@ void ctulimit::run(void)
 /***********************************************************************//**
  * @brief Save maps
  *
- * This method saves the upper limit to an ascii file
+ * This method saves the upper limit to an ascii file.
+ *
+ * @todo No yet implemented as we have no clear use case yet for saving
+ * the result.
  ***************************************************************************/
 void ctulimit::save(void)
 {
@@ -347,6 +350,7 @@ void ctulimit::save(void)
         log.header1("Save upper limit");
     }
 
+    /*
     // Get output filename
     m_outfile = (*this)["outfile"].filename();
 
@@ -359,7 +363,8 @@ void ctulimit::save(void)
 
     // Save CSV table
     table.save(m_outfile, " ", clobber());
-
+    */
+    
     // Return
     return;
 }
@@ -377,7 +382,6 @@ void ctulimit::save(void)
 void ctulimit::init_members(void)
 {
     // Initialise user parameters
-    m_outfile.clear();
     m_srcname.clear();
     m_confidence = 0.95;
     m_sigma_min  = 0.0;
@@ -411,7 +415,6 @@ void ctulimit::init_members(void)
 void ctulimit::copy_members(const ctulimit& app)
 {
     // Copy user parameters
-    m_outfile    = app.m_outfile;
     m_srcname    = app.m_srcname;
     m_confidence = app.m_confidence;
     m_sigma_min  = app.m_sigma_min;
@@ -515,12 +518,6 @@ void ctulimit::get_parameters(void)
     m_tol      = (*this)["tol"].real();
     m_max_iter = (*this)["max_iter"].integer();
 
-    // Optionally read ahead parameters so that they get correctly
-    // dumped into the log file
-    if (read_ahead()) {
-        m_outfile = (*this)["outfile"].filename();
-    }
-
     // Return
     return;
 }
@@ -558,11 +555,14 @@ void ctulimit::get_model_parameter(void)
         else if (m_skymodel->spectral()->has_par("Integral")) {
             m_model_par = &(m_skymodel->spectral()->operator[]("Integral"));
         }
+        else if (m_skymodel->spectral()->has_par("Value")) {
+            m_model_par = &(m_skymodel->spectral()->operator[]("Value"));
+        }
         else {
             std::string msg = "Require spectral parameter \"Normalization\", "
-                              "\"Prefactor\" or \"Integral\" for upper limit "
-                              "computation. The specified source \""+m_srcname+
-                              "\" does not have such a parameter.";
+                              "\"Prefactor\", \"Integral\" or \"Value\" for "
+                              "upper limit computation. The specified source "
+                              "\""+m_srcname+"\" does not have such a parameter.";
             throw GException::invalid_value(G_GET_MODEL_PARAMETER, msg);
         }
 
diff --git a/src/ctulimit/ctulimit.hpp b/src/ctulimit/ctulimit.hpp
index 9de3b30..8eb6727 100644
--- a/src/ctulimit/ctulimit.hpp
+++ b/src/ctulimit/ctulimit.hpp
@@ -84,7 +84,6 @@ protected:
 
     // User parameters
     std::string   m_srcname;      //!< Name of source which is moved around
-    std::string   m_outfile;      //!< Output ascii file
     double        m_confidence;   //!< Confidence level
     double        m_sigma_min;    //!< Starting value minimum (multiple fit errors above fit values)
     double        m_sigma_max;    //!< Starting value maximum (multiple fit errors above fit values)
diff --git a/src/ctulimit/ctulimit.par b/src/ctulimit/ctulimit.par
index 0489eeb..d3cf453 100644
--- a/src/ctulimit/ctulimit.par
+++ b/src/ctulimit/ctulimit.par
@@ -24,7 +24,6 @@ expcube,  f, a, "NONE",,, "Exposure cube file (only needed for stacked analysis)
 psfcube,  f, a, "NONE",,, "PSF cube file (only needed for stacked analysis)"
 caldb,    s, a, "dummy",,, "Calibration database"
 irf,      s, a, "cta_dummy_irf",,, "Instrument response function"
-outfile,  f, a, "upperlimit.txt",,, "Output ASCII file"
 
 #
 # Upper limit calculation parameters
diff --git a/test/test_ctools.sh b/test/test_ctools.sh
index 0984d7c..aa51ca1 100755
--- a/test/test_ctools.sh
+++ b/test/test_ctools.sh
@@ -608,15 +608,14 @@ $ECHO -n "Test ctulimit: "
 $ctulimit inobs="data/crab_events.fits.gz" \
     inmodel="data/crab.xml" \
     srcname="Crab" \
-    outfile="ulimit.dat" \
     caldb="irf" \
     irf="cta_dummy_irf"
 $ECHO -n "."
-if [ -s "ulimit.dat" ]
+if [ -s "ctulimit.log" ]
 then
     $ECHO -n "."
 else
-    $ECHO " ulimit.dat file is not found"
+    $ECHO " ctulimit.log file is not found"
     exit 1
 fi
 $ECHO " ok"
diff --git a/test/test_ctulimit.py b/test/test_ctulimit.py
index 49685f0..4e0a36d 100755
--- a/test/test_ctulimit.py
+++ b/test/test_ctulimit.py
@@ -72,7 +72,6 @@ class Test(gammalib.GPythonTestSuite):
         ulimit["srcname"].string("Crab")
         ulimit["caldb"].string(self.caldb)
         ulimit["irf"].string(self.irf)
-        ulimit["outfile"].filename("ulimit.dat")
         
         # Run tool
         self.test_try("Run ctulimit")