diff --git a/src/ctbutterfly/ctbutterfly.cpp b/src/ctbutterfly/ctbutterfly.cpp
index 29bd31c..ae34631 100755
--- a/src/ctbutterfly/ctbutterfly.cpp
+++ b/src/ctbutterfly/ctbutterfly.cpp
@@ -1,7 +1,7 @@
 /***************************************************************************
  *                 ctbutterfly - butterfly calculation tool                *
  * ----------------------------------------------------------------------- *
- *  copyright (C) 2014-2018 by Michael Mayer                               *
+ *  copyright (C) 2014-2019 by Michael Mayer                               *
  * ----------------------------------------------------------------------- *
  *                                                                         *
  *  This program is free software: you can redistribute it and/or modify   *
@@ -468,6 +468,10 @@ void ctbutterfly::get_parameters(void)
         // m_covariance.load(matrixfilename);
     }
 
+    // Set optimizer characteristics from user parameters
+    m_opt.eps((*this)["like_accuracy"].real());
+    m_opt.max_iter((*this)["max_iter"].integer());
+
     // Get remaining parameters
     m_apply_edisp = (*this)["edisp"].boolean();
     m_method      = (*this)["method"].string();
diff --git a/src/cterror/cterror.cpp b/src/cterror/cterror.cpp
index a0d295b..76a359f 100755
--- a/src/cterror/cterror.cpp
+++ b/src/cterror/cterror.cpp
@@ -1,7 +1,7 @@
 /***************************************************************************
  *                 cterror - Parameter error calculation tool              *
  * ----------------------------------------------------------------------- *
- *  copyright (C) 2015-2018 by Florent Forest                              *
+ *  copyright (C) 2015-2019 by Florent Forest                              *
  * ----------------------------------------------------------------------- *
  *                                                                         *
  *  This program is free software: you can redistribute it and/or modify   *
@@ -468,6 +468,10 @@ void cterror::get_parameters(void)
     double sigma = gammalib::erfinv(m_confidence) * gammalib::sqrt_two;
     m_dlogL      = (sigma*sigma) / 2.0;
 
+    // Set optimizer characteristics from user parameters
+    m_opt.eps((*this)["like_accuracy"].real());
+    m_opt.max_iter((*this)["max_iter"].integer());
+
     // Read other parameters
     m_tol      = (*this)["tol"].real();
     m_max_iter = (*this)["max_iter"].integer();
diff --git a/src/ctlike/ctlike.cpp b/src/ctlike/ctlike.cpp
index 8df0dc5..59a257c 100755
--- a/src/ctlike/ctlike.cpp
+++ b/src/ctlike/ctlike.cpp
@@ -1,7 +1,7 @@
 /***************************************************************************
  *                ctlike - Maximum likelihood fitting tool                 *
  * ----------------------------------------------------------------------- *
- *  copyright (C) 2010-2018 by Juergen Knoedlseder                         *
+ *  copyright (C) 2010-2019 by Juergen Knoedlseder                         *
  * ----------------------------------------------------------------------- *
  *                                                                         *
  *  This program is free software: you can redistribute it and/or modify   *
@@ -407,6 +407,10 @@ void ctlike::get_parameters(void)
 
     } // endif: no models were associated with observations
 
+    // Set optimizer characteristics from user parameters
+    m_opt.eps((*this)["like_accuracy"].real());
+    m_opt.max_iter((*this)["max_iter"].integer());
+
     // Get other parameters
     m_refit           = (*this)["refit"].boolean();
     m_apply_edisp     = (*this)["edisp"].boolean();
diff --git a/src/ctulimit/ctulimit.cpp b/src/ctulimit/ctulimit.cpp
index f564beb..3ad3573 100755
--- a/src/ctulimit/ctulimit.cpp
+++ b/src/ctulimit/ctulimit.cpp
@@ -1,7 +1,7 @@
 /***************************************************************************
  *                   ctulimit - Upper limit calculation tool               *
  * ----------------------------------------------------------------------- *
- *  copyright (C) 2015-2018 by Michael Mayer                               *
+ *  copyright (C) 2015-2019 by Michael Mayer                               *
  * ----------------------------------------------------------------------- *
  *                                                                         *
  *  This program is free software: you can redistribute it and/or modify   *
@@ -463,6 +463,10 @@ void ctulimit::get_parameters(void)
     m_emin = (*this)["emin"].real();
     m_emax = (*this)["emax"].real();
 
+    // Set optimizer characteristics from user parameters
+    m_opt.eps((*this)["like_accuracy"].real());
+    m_opt.max_iter((*this)["max_iter"].integer());
+
     // Read precision
     m_tol      = (*this)["tol"].real();
     m_max_iter = (*this)["max_iter"].integer();