diff --git a/lib/sql3.hpp b/lib/sql3.hpp
index 9f83063..37762d4 100644
--- a/lib/sql3.hpp
+++ b/lib/sql3.hpp
@@ -22,7 +22,6 @@ class sql3 {
     sqlite3* db;
     string path;
     bool keepOpen;
-    // map<string, vector<string>> model;
     string Answer;
     map<string, vector<string>> parsed;
     
diff --git a/src/sql3.cpp b/src/sql3.cpp
index c31f27c..7e29b20 100644
--- a/src/sql3.cpp
+++ b/src/sql3.cpp
@@ -6,7 +6,7 @@ sql3::sql3(const string _path, bool _keepOpen) {
 
    if (keepOpen) {
       if (open()) {
-         throw "[ERROR] Unable to open database ";
+         throw string("[ERROR] Unable to open database ");
       }
    }
 
@@ -27,7 +27,7 @@ bool sql3::run(const string sql_command) {
 
    if (!keepOpen) {
       if (open()) {
-         throw "[ERROR] Unable to open database ";
+         throw string("[ERROR] Unable to open database ");
       }
    }
 
@@ -47,7 +47,7 @@ bool sql3::run(const string sql_command) {
 
    if (!keepOpen) {
       if(close()) {
-         throw "[ERROR] Unable to close database ";
+         throw string("[ERROR] Unable to close database ");
       }
    }
 
@@ -62,7 +62,7 @@ string sql3::answer() {
 
 string sql3::ask(const string sql_command) {
    if (!run(sql_command)) {
-      throw "[ERROR] Unable to read database ";
+      throw string("[ERROR] Unable to read database ");
       //return {};
    }
    else {
@@ -72,7 +72,7 @@ string sql3::ask(const string sql_command) {
 
 map<string, vector<string>> sql3::query(const string sql_command) {
    if (!run(sql_command)) {
-      throw "[ERROR] Unable to read database ";
+      throw string("[ERROR] Unable to read database ");
       //return {};
    }
    else {
@@ -104,7 +104,7 @@ void sql3::mapit() {
 
 sql3::~sql3() {
    if(close()) {
-      throw "[ERROR] Unable to close database ";
+      throw string("[ERROR] Unable to close database ");
    }
 }
 
@@ -117,6 +117,7 @@ static int callback(void* data, int argc, char** argv, char** azColName) {
    int i;
    fprintf(stderr, "%s: ", (const char*)data);
    char res[1000];
+   responseDatabase.clear();
    for (i = 0; i < argc; i++) {
       sprintf(res, "%s = %s", azColName[i], argv[i] ? argv[i] : "NULL");
       responseDatabase += res;
diff --git a/test/test.o b/test/test.o
index b364b55..17505af 100755
Binary files a/test/test.o and b/test/test.o differ