diff --git a/src/algorithms/libs/rtklib/rtklib_stream.cc b/src/algorithms/libs/rtklib/rtklib_stream.cc
index b301cfb1b..2810bc6cc 100644
--- a/src/algorithms/libs/rtklib/rtklib_stream.cc
+++ b/src/algorithms/libs/rtklib/rtklib_stream.cc
@@ -1493,7 +1493,6 @@ void decodeftppath(const char *path, char *addr, char *file, char *user,
                     *q = '\0';
                     if (passwd) strcpy(passwd, q + 1);
                 }
-            if (*q != 0) *q = '\0';
             if (user) strcpy(user, buff);
         }
     else
diff --git a/src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/lib/qa_utils.cc b/src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/lib/qa_utils.cc
index 60fb651c0..58db3bac1 100644
--- a/src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/lib/qa_utils.cc
+++ b/src/algorithms/libs/volk_gnsssdr_module/volk_gnsssdr/lib/qa_utils.cc
@@ -565,6 +565,11 @@ bool run_volk_gnsssdr_tests(volk_gnsssdr_func_desc_t desc,
             std::cerr << "  - " << name << std::endl;
             return false;
         }
+    catch (std::string s)
+        {
+            std::cerr << "Error: " << s << std::endl;
+            return false;
+        }
 
     //pull the input scalars into their own vector
     std::vector<volk_gnsssdr_type_t> inputsc;
diff --git a/src/tests/common-files/gnuplot_i.h b/src/tests/common-files/gnuplot_i.h
index 0c9e282a7..6bb6d7d4f 100644
--- a/src/tests/common-files/gnuplot_i.h
+++ b/src/tests/common-files/gnuplot_i.h
@@ -56,6 +56,7 @@
 #include <stdexcept>
 #include <cstdio>
 #include <cstdlib>  // for getenv()
+#include <cstring>  // for strncpy
 #include <cmath>
 #include <list>  // for std::list
 
@@ -1962,44 +1963,48 @@ bool Gnuplot::get_program_path()
     char *path;
     // Retrieves a C string containing the value of environment variable PATH
     path = std::getenv("PATH");
-
-    if (path == NULL || std::char_traits<char>::length(path) > 4096 * sizeof(char))
+    char secured_path[4096];
+    size_t len = strlen(path);
+    if (path && len < 4046 * sizeof(char))
         {
-            throw GnuplotException("Path is not set");
+            strncpy(secured_path, path, len);
         }
     else
         {
-            std::list<std::string> ls;
-            std::string path_str(path);
-
-            //split path (one long string) into list ls of strings
-#if defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__TOS_WIN__)
-            stringtok(ls, path_str, ";");
-#elif defined(unix) || defined(__unix) || defined(__unix__) || defined(__APPLE__)
-            stringtok(ls, path_str, ":");
-#endif
-
-            // scan list for Gnuplot program files
-            for (std::list<std::string>::const_iterator i = ls.begin();
-                 i != ls.end(); ++i)
-                {
-                    tmp = (*i) + "/" + Gnuplot::m_sGNUPlotFileName;
-#if defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__TOS_WIN__)
-                    if (Gnuplot::file_exists(tmp, 0))  // check existence
-#elif defined(unix) || defined(__unix) || defined(__unix__) || defined(__APPLE__)
-                    if (Gnuplot::file_exists(tmp, 1))  // check existence and execution permission
-#endif
-                        {
-                            Gnuplot::m_sGNUPlotPath = *i;  // set m_sGNUPlotPath
-                            return true;
-                        }
-                }
-
-            tmp = "Can't find gnuplot neither in PATH nor in \"" +
-                  Gnuplot::m_sGNUPlotPath + "\"";
-            Gnuplot::m_sGNUPlotPath = "";
-            throw GnuplotException(tmp);
+            throw GnuplotException("Path is not set or it is too long");
         }
+    secured_path[len] = '\0';
+    std::string path_str(secured_path);
+
+    std::list<std::string> ls;
+
+    //split path (one long string) into list ls of strings
+#if defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__TOS_WIN__)
+    stringtok(ls, path_str, ";");
+#elif defined(unix) || defined(__unix) || defined(__unix__) || defined(__APPLE__)
+    stringtok(ls, path_str, ":");
+#endif
+
+    // scan list for Gnuplot program files
+    for (std::list<std::string>::const_iterator i = ls.begin();
+         i != ls.end(); ++i)
+        {
+            tmp = (*i) + "/" + Gnuplot::m_sGNUPlotFileName;
+#if defined(WIN32) || defined(_WIN32) || defined(__WIN32__) || defined(__TOS_WIN__)
+            if (Gnuplot::file_exists(tmp, 0))  // check existence
+#elif defined(unix) || defined(__unix) || defined(__unix__) || defined(__APPLE__)
+            if (Gnuplot::file_exists(tmp, 1))  // check existence and execution permission
+#endif
+                {
+                    Gnuplot::m_sGNUPlotPath = *i;  // set m_sGNUPlotPath
+                    return true;
+                }
+        }
+
+    tmp = "Can't find gnuplot neither in PATH nor in \"" +
+          Gnuplot::m_sGNUPlotPath + "\"";
+    Gnuplot::m_sGNUPlotPath = "";
+    throw GnuplotException(tmp);
 }
 
 
diff --git a/src/utils/front-end-cal/main.cc b/src/utils/front-end-cal/main.cc
index cbdb6d28b..6467dac25 100644
--- a/src/utils/front-end-cal/main.cc
+++ b/src/utils/front-end-cal/main.cc
@@ -477,7 +477,19 @@ int main(int argc, char** argv)
     if (global_gps_ephemeris_map.size() > 0)
         {
             std::map<int, Gps_Ephemeris> Eph_map;
-            Eph_map = global_gps_ephemeris_map.get_map_copy();
+            try
+                {
+                    Eph_map = global_gps_ephemeris_map.get_map_copy();
+                }
+            catch (const boost::exception& e)
+                {
+                    std::cout << "Exception in getting Global ephemeris map" << std::endl;
+                    delete acquisition;
+                    delete gnss_synchro;
+                    google::ShutDownCommandLineFlags();
+                    std::cout << "GNSS-SDR Front-end calibration program ended." << std::endl;
+                    return 0;
+                }
             current_TOW = Eph_map.begin()->second.d_TOW;
 
             time_t t = utc_time(Eph_map.begin()->second.i_GPS_week, (long int)current_TOW);