diff --git a/lib/mysql.hpp b/lib/mysql.hpp
index dc07a36..0c5bf46 100644
--- a/lib/mysql.hpp
+++ b/lib/mysql.hpp
@@ -103,12 +103,10 @@ class MySQL {
     queue<Connection*> connection_pool;
     string path, username, password, database;
     uint32_t pool_size;
-    uint32_t connect_trys = 3;
     bool run_tloop = true;
     future<void> tloop_future;
     time_loop_type tloop_type;
-    time_t last_loop_time = time(nullptr);
-    function<void(const string&)> on_error;
+    time_t last_loop_time;
     
     /**
      * Open one database server connection
@@ -158,6 +156,9 @@ class MySQL {
     void _tloop();
 
 public:
+    function<void(const string&)> on_error;
+    uint32_t connect_trys = 3;
+
 
     /**
      * MySQL constructor,
@@ -167,18 +168,6 @@ public:
     */
     MySQL(const string _path, const string _username, const string _password, const string _db, const uint32_t _available = 1, const time_loop_type _engine_type = time_loop_type::internal);
 
-
-    /**
-     * Define the maximum number of attempts to
-     * reconnect to the server 
-    */
-    void set_connect_trys(const uint32_t _trys);
-
-    /**
-     *  Set callback on error
-     */
-    void set_on_error(function<void(const string&)> _on_error);
-
     /**
      * Execute the SQL statement
     */
diff --git a/src/mysql.cpp b/src/mysql.cpp
index 7883909..517ecf5 100644
--- a/src/mysql.cpp
+++ b/src/mysql.cpp
@@ -21,6 +21,8 @@ marcelb::mysql::MySQL::MySQL(const string _path, const string _username, const s
          return;
       });  
    }
+   // set on initialization to avoid the error
+   last_loop_time = time(nullptr);
 }
 
 
@@ -94,11 +96,16 @@ bool marcelb::mysql::MySQL::disconnect_connection(Connection* connection) {
 }
 
 void marcelb::mysql::MySQL::_tloop() {
-   for (size_t i = 0; i < pool_size && run_tloop; i++) {
+   if (!run_tloop) {
+      return;
+   }
+   lock_guard<mutex> lock(io);
+   for (size_t i=0; i<connection_pool.size(); i++) {
       try {
-         Connection *conn = occupy_connection();
+         Connection *conn = connection_pool.front();
+         connection_pool.pop();
          if (conn->isValid()) {
-            release_connection(conn);
+            connection_pool.push(conn);
          } else {
             if (!conn->isClosed()){
                   conn->close();
@@ -112,21 +119,15 @@ void marcelb::mysql::MySQL::_tloop() {
          }
       }
    }
-   last_loop_time = time(nullptr);
-}
 
-void marcelb::mysql::MySQL::set_connect_trys(const uint32_t _trys) {
-   // lock_guard<mutex> lock(io);
-   connect_trys = _trys;
-}
-
-void  marcelb::mysql::MySQL::set_on_error(function<void(const string&)> _on_error) {
-   on_error = _on_error;
+   last_loop_time = time(nullptr);
 }
 
 Connection* marcelb::mysql::MySQL::occupy_connection() {
-   if (last_loop_time + (MYSQL_PERIODIC_INTERNAL_TIME/1000)*3 < time(nullptr) && on_error) {   // ako je zadnje vrijeme + 3 intervala manje od trenutnog vremena emitiraj grešku
-      on_error("The time loop is not executing properly");
+   if (last_loop_time + (MYSQL_PERIODIC_INTERNAL_TIME*3/1000) < time(nullptr)) {
+      if (on_error) {
+         on_error("The time loop is not executing properly");
+      }
    }
    unique_lock<mutex> lock(io);
    while (connection_pool.empty()) {
diff --git a/test/test.cpp b/test/test.cpp
index 5ebb1bd..e54990f 100644
--- a/test/test.cpp
+++ b/test/test.cpp
@@ -13,19 +13,20 @@ using namespace marcelb::asynco;
 
 int main() {
     try {
-        MySQL mydb("tcp://192.168.2.10:3306", "dinio", "H€r5elfInd1aH@nds", "dinio", 5, time_loop_type::internal);
-        // MySQL mydb("tcp://bitelex.ddns.net:3306", "dinio", "H€r5elfInd1aH@nds", "dinio", 10, time_loop_type::external);
+        // MySQL mydb("tcp://192.168.2.10:3306", "dinio", "H€r5elfInd1aH@nds", "dinio", 5, time_loop_type::internal);
+        MySQL mydb("tcp://bitelex.ddns.net:3306", "dinio", "H€r5elfInd1aH@nds", "dinio", 5, time_loop_type::external);
         // MySQL mydb("tcp://bitelex.ddns.net:3306", "dinio", "H€r5elfInd1aH@nds", "dinio", 5);
 
-        mydb.set_on_error( [](const string& error) {
+        mydb.on_error = [](const string& error) {
             cout << error << endl;
-        });
+        };
 
         periodic mysql_tloop ( [&mydb] () {
+            cout << "loop---------------------------" << endl;
             mydb.tloop();
         }, MYSQL_PERIODIC_INTERNAL_TIME);
 
-
+while (true) {
         sleep(5);
 
         auto start = high_resolution_clock::now();
@@ -44,8 +45,8 @@ int main() {
                     cout << column_name << endl;
                 }
 
-            } catch (const string err) {
-                cout << err << endl;
+            } catch (const SQLException error) {
+                cout << error.what() << endl;
             }
         });
 
@@ -63,8 +64,8 @@ int main() {
                     cout << column_name << endl;
                 }
 
-            } catch (const string err) {
-                cout << err << endl;
+            } catch (const SQLException error) {
+                cout << error.what() << endl;
             }
         });
 
@@ -82,8 +83,8 @@ int main() {
                     cout << column_name << endl;
                 }
 
-            } catch (const string err) {
-                cout << err << endl;
+            } catch (const SQLException error) {
+                cout << error.what() << endl;
             }
         });
 
@@ -101,8 +102,8 @@ int main() {
                     cout << column_name << endl;
                 }
 
-            } catch (const string err) {
-                cout << err << endl;
+            } catch (const SQLException error) {
+                cout << error.what() << endl;
             }
         });
 
@@ -120,8 +121,8 @@ int main() {
                     cout << column_name << endl;
                 }
 
-            } catch (const string err) {
-                cout << err << endl;
+            } catch (const SQLException error) {
+                cout << error.what() << endl;
             }
         });
 
@@ -139,8 +140,8 @@ int main() {
                     cout << column_name << endl;
                 }
 
-            } catch (const string err) {
-                cout << err << endl;
+            } catch (const SQLException error) {
+                cout << error.what() << endl;
             }
         });
 
@@ -156,9 +157,10 @@ int main() {
         auto duration = duration_cast<microseconds>(end - start);
         cout << "-------------Izvršilo se za: " << (double)(duration.count() / 1000.0) << " ms"<< endl;
         
-        sleep(100);
-        
         
+}       
+        sleep(100);
+
     } catch (const SQLException error) {
         cout << error.what() << endl;
     } catch (const string error) {