diff --git a/logdoctor/modules/checks.cpp b/logdoctor/modules/checks.cpp
index d22adcb3..401a2e10 100644
--- a/logdoctor/modules/checks.cpp
+++ b/logdoctor/modules/checks.cpp
@@ -81,7 +81,6 @@ bool CheckSec::newStatsDatabase( QSqlDatabase& db, const std::string& db_path, c
     } else {
         // succesfully creted database file, now create the tables
         QSqlQuery query;
-        int tries;
         for ( const QString& ws_name : ws_names ) {
             if ( successful == false ) { break; }
             // compose the statement with the table name for the access logs
@@ -405,7 +404,6 @@ bool CheckSec::newHashesDatabase( QSqlDatabase& db, const std::string& db_path,
     } else {
         // succesfully creted database file, now create the tables
         QSqlQuery query;
-        int tries;
         for ( const QString& ws_name : ws_names ) {
             if ( successful == false ) { break; }
             // compose the statement with the table name for the access logs
diff --git a/logdoctor/tools/craplog/modules/hash.cpp b/logdoctor/tools/craplog/modules/hash.cpp
index c7fe19df..8191bea2 100644
--- a/logdoctor/tools/craplog/modules/hash.cpp
+++ b/logdoctor/tools/craplog/modules/hash.cpp
@@ -33,13 +33,6 @@ bool HashOps::loadUsedHashesLists( const std::string& db_path )
 {
     bool successful = true;
     const QString db_name = QString::fromStdString( db_path.substr( db_path.find_last_of( '/' ) + 1 ) );
-    const std::unordered_map<int, QString> ws_names = {
-        {11, "apache"},
-        {12, "nginx"},
-        {13, "iis"} };
-    const std::unordered_map<int, QString> log_types = {
-        {1, "access"},
-        {2, "error"} };
 
     QSqlDatabase db = QSqlDatabase::addDatabase("QSQLITE");
     db.setDatabaseName( QString::fromStdString( db_path ) );
@@ -55,8 +48,8 @@ bool HashOps::loadUsedHashesLists( const std::string& db_path )
 
     } else {
         QSqlQuery query = QSqlQuery( db );
-        for ( const auto& [wid,name] : ws_names ) {
-            for ( const auto& [tid,type] : log_types ) {
+        for ( const auto& [wid,name] : this->ws_names ) {
+            for ( const auto& [tid,type] : this->log_types ) {
                 if ( query.exec("SELECT hash FROM "+name+"_"+type+";") == false ) {
                     // error querying database
                     successful = false;
diff --git a/logdoctor/tools/craplog/modules/logs.h b/logdoctor/tools/craplog/modules/logs.h
index 764716ee..506499af 100644
--- a/logdoctor/tools/craplog/modules/logs.h
+++ b/logdoctor/tools/craplog/modules/logs.h
@@ -61,7 +61,7 @@ private:
         const FormatOps::LogsFormat& format
         );
     // temporary vars
-    int size, lines;
+    int size=0, lines=0;
 
 
 };
diff --git a/logdoctor/tools/crapview/modules/query.cpp b/logdoctor/tools/crapview/modules/query.cpp
index f0134786..d7f63ba8 100644
--- a/logdoctor/tools/crapview/modules/query.cpp
+++ b/logdoctor/tools/crapview/modules/query.cpp
@@ -263,7 +263,6 @@ void DbQuery::updateWarnings( const QString& web_server, const QString& log_type
 
     if ( db.open() == false ) {
         // error opening database
-        successful = false;
         QString err_msg = "";
         if ( this->dialog_level == 2 ) {
             err_msg = db.lastError().text();
@@ -364,7 +363,7 @@ void DbQuery::getWarnCounts( std::tuple<bool, std::vector<std::vector<std::vecto
                 DialogSec::errGeneric( nullptr, QString("%1:\n%2").arg(this->MSG_ERR_UNX_LT).arg( log_type ), true );
             }
         }
-        int year, month, day, hour, minute;
+        int year, month, day, hour;
         if ( successful == true ) {
             // setup period limits
             try {
@@ -620,16 +619,16 @@ void DbQuery::getSpeedData(std::tuple<bool, std::vector<std::tuple<long long, st
 
             } else {
                 try {
-                    // get query data
-                    int hour=-1,  aux_hour,   prev_hour=0,   h,
-                        minute=0, aux_minute, prev_minute=0, m,
-                        second=0, aux_second, prev_second=0, s;
 
                     if ( query.size() == 0 ) {
                         // no result found
                         ;
 
                     } else {
+                        // get query data
+                        int hour=-1,  aux_hour,   prev_hour=0,   h,
+                            minute=0, aux_minute, prev_minute=0, m,
+                            second=0, aux_second, prev_second=0, s;
                         QString tt, ur, qr, mt, pt, rs;
                         while ( query.next() ) {
                             aux_hour   = query.value(0).toInt();
@@ -1293,8 +1292,6 @@ void DbQuery::getRelationalCountsDay(std::tuple<bool, std::vector<std::tuple<lon
             QString log_field_1 = this->LogFields_to_DbFields.value( log_field_1_ ),
                     log_field_2 = this->LogFields_to_DbFields.value( log_field_2_ );
 
-            int hour, aux_hour, minute, aux_minute, count;
-
             // 1 month, no need to loop
             stmt = QString("SELECT \"hour\", \"minute\" FROM \"%1\" WHERE \"year\"=%2 AND \"month\"=%3 AND \"day\"=%4")
                 .arg( table.replace("'","''") )
@@ -1381,6 +1378,7 @@ void DbQuery::getRelationalCountsDay(std::tuple<bool, std::vector<std::tuple<lon
             } else {
                 try {
                     // get query data
+                    int hour, aux_hour, minute, aux_minute, count;
                     int gap = 20;
                     hour = -1;
                     minute = count = 0;
@@ -1557,8 +1555,7 @@ void DbQuery::getRelationalCountsPeriod(std::tuple<bool, std::vector<std::tuple<
             QString log_field_1 = this->LogFields_to_DbFields.value( log_field_1_ ),
                     log_field_2 = this->LogFields_to_DbFields.value( log_field_2_ );
 
-            int n_days   = 0,
-                n_months = this->getMonthsCount( from_year, from_month, to_year, to_month );
+            int n_months = this->getMonthsCount( from_year, from_month, to_year, to_month );
 
             QDateTime time;
             int year  = from_year,
diff --git a/logdoctor/utilities/io.cpp b/logdoctor/utilities/io.cpp
index c303dc87..ba1849d5 100644
--- a/logdoctor/utilities/io.cpp
+++ b/logdoctor/utilities/io.cpp
@@ -108,7 +108,6 @@ bool IOutils::renameAsCopy( const std::string& path ) noexcept(true)
 const std::vector<std::string> IOutils::readLines(const std::string& path, const int n_lines, const bool random, const bool strip_lines )
 {
     // read rhe first N lines only
-    bool result = true;
     std::ifstream file;
     std::string line;
     std::vector<std::string> lines, aux_lines;
@@ -175,7 +174,6 @@ const std::vector<std::string> IOutils::readLines(const std::string& path, const
         // failed reading
         lines.clear();
         aux_lines.clear();
-        result = false;
         if ( file.is_open() ) {
             file.close();
         }
@@ -183,7 +181,6 @@ const std::vector<std::string> IOutils::readLines(const std::string& path, const
     } catch (...) {
         lines.clear();
         aux_lines.clear();
-        result = false;
         if ( file.is_open() ) {
             file.close();
         }
@@ -192,6 +189,7 @@ const std::vector<std::string> IOutils::readLines(const std::string& path, const
     if ( file.is_open() ) {
         file.close();
     }
+    aux_lines.clear();
     return lines;
 }
 
@@ -203,7 +201,7 @@ const std::string IOutils::readFile( const std::string& path )
     std::string content = std::string();
     try {
         constexpr std::size_t read_size = std::size_t(4096);
-        std::ifstream file(path);
+        file = std::ifstream(path);
         if ( file.is_open() == false ) {
             throw std::ios_base::failure( "file is not open" );
         }
@@ -219,13 +217,11 @@ const std::string IOutils::readFile( const std::string& path )
             std::istreambuf_iterator<char>() );
     } catch (const std::ios_base::failure& err) {
         // failed reading
-        content = "";
         if ( file.is_open() == true ) {
             file.close();
         }
         throw err;
     } catch (...) {
-        content = "";
         if ( file.is_open() == true ) {
             file.close();
         }
diff --git a/logdoctor/utilities/rtf.cpp b/logdoctor/utilities/rtf.cpp
index 716df505..45d83b73 100644
--- a/logdoctor/utilities/rtf.cpp
+++ b/logdoctor/utilities/rtf.cpp
@@ -27,7 +27,7 @@ void RichText::enrichLogs( QString &rich_content, const std::string& content, co
     QString rich_line="", class_name="";
     std::string sep, fld, fld_str, aux_sep1, aux_sep2, aux_fld_str;
     bool missing=false;
-    int start, stop=0, i, aux_start1, aux_start2, aux_stop,
+    int start, stop, i, aux_start1, aux_start2, aux_stop,
         line_size, sep_size,
         n_sep = logs_format.separators.size()-1;
     std::vector<std::string> lines;
diff --git a/logdoctor/utilities/strings.cpp b/logdoctor/utilities/strings.cpp
index 634fd6e2..ab2eabf4 100644
--- a/logdoctor/utilities/strings.cpp
+++ b/logdoctor/utilities/strings.cpp
@@ -138,7 +138,7 @@ std::string StringOps::lstrip( const std::string& str, const std::string& chars
 
 std::string StringOps::rstrip( const std::string& str, const std::string& chars )
 {
-    bool found = true;
+    bool found;
     int i = str.size() - 1;
     while ( i >= 0 ) {
         found = false;
@@ -233,8 +233,8 @@ void StringOps::split( std::vector<std::string>& list, const std::string& target
 void StringOps::splitrip( std::vector<std::string>& list, const std::string& target_str, const std::string& separator, const std::string& strip )
 {
     std::vector<std::string> aux;
-    const std::string str = StringOps::strip( target_str, strip );
-    StringOps::split( aux, str, separator );
+    const std::string str_ = StringOps::strip( target_str, strip );
+    StringOps::split( aux, str_, separator );
     for ( const std::string& str : aux ) {
         if ( str.size() == 0 ) {
             continue;