diff --git a/src/Base/Sequencer.cpp b/src/Base/Sequencer.cpp
index 5bfae5b28e..eb195d2295 100644
--- a/src/Base/Sequencer.cpp
+++ b/src/Base/Sequencer.cpp
@@ -126,8 +126,8 @@ void SequencerBase::startStep()
 bool SequencerBase::next(bool canAbort)
 {
     this->nProgress++;
-    float fDiv = this->nTotalSteps > 0 ? (float)this->nTotalSteps : 1000.0f;
-    int perc = (int)((float)this->nProgress * (100.0f / fDiv));
+    float fDiv = this->nTotalSteps > 0 ? static_cast<float>(this->nTotalSteps) : 1000.0f;
+    int perc = int((float(this->nProgress) * (100.0f / fDiv)));
 
     // do only an update if we have increased by one percent
     if (perc > this->_nLastPercentage) {
@@ -220,26 +220,8 @@ void SequencerBase::setText(const char*)
 
 // ---------------------------------------------------------
 
-EmptySequencer::EmptySequencer()
-{
-}
-
-EmptySequencer::~EmptySequencer()
-{
-}
-
-// ---------------------------------------------------------
-
 using Base::ConsoleSequencer;
 
-ConsoleSequencer::ConsoleSequencer ()
-{
-}
-
-ConsoleSequencer::~ConsoleSequencer ()
-{
-}
-
 void ConsoleSequencer::setText (const char* pszTxt)
 {
     printf("%s...\n", pszTxt);
@@ -252,7 +234,7 @@ void ConsoleSequencer::startStep()
 void ConsoleSequencer::nextStep( bool )
 {
     if (this->nTotalSteps != 0)
-        printf("\t\t\t\t\t\t(%2.1f %%)\t\r", (float)progressInPercent());
+        printf("\t\t\t\t\t\t(%d %%)\t\r", progressInPercent());
 }
 
 void ConsoleSequencer::resetData()
@@ -353,8 +335,8 @@ Py::Object ProgressIndicatorPy::repr()
 Py::Object ProgressIndicatorPy::start(const Py::Tuple& args)
 {
     char* text;
-    int steps;
-    if (!PyArg_ParseTuple(args.ptr(), "si",&text,&steps))
+    unsigned int steps;
+    if (!PyArg_ParseTuple(args.ptr(), "sI",&text,&steps))
         throw Py::Exception();
     if (!_seq.get())
         _seq.reset(new SequencerLauncher(text,steps));
diff --git a/src/Base/Sequencer.h b/src/Base/Sequencer.h
index d60040e516..0b5e22f786 100644
--- a/src/Base/Sequencer.h
+++ b/src/Base/Sequencer.h
@@ -206,6 +206,8 @@ protected:
 protected:
     /** construction */
     SequencerBase();
+    SequencerBase(const SequencerBase&) = default;
+    SequencerBase& operator=(const SequencerBase&) = default;
     /** Destruction */
     virtual ~SequencerBase();
     /**
@@ -253,9 +255,7 @@ class BaseExport EmptySequencer : public Base::SequencerBase
 {
 public:
     /** construction */
-    EmptySequencer();
-    /** Destruction */
-    ~EmptySequencer();
+    EmptySequencer() = default;
 };
 
 /**
@@ -265,9 +265,7 @@ class BaseExport ConsoleSequencer : public SequencerBase
 {
 public:
     /** construction */
-    ConsoleSequencer ();
-    /** Destruction */
-    ~ConsoleSequencer ();
+    ConsoleSequencer () = default;
 
 protected:
     /** Starts the sequencer */
@@ -374,6 +372,10 @@ public:
     bool next(bool canAbort = false);
     void setProgress(size_t);
     bool wasCanceled() const;
+
+private:
+    SequencerLauncher(const SequencerLauncher&);
+    void operator=(const SequencerLauncher&);
 };
 
 /** Access to the only SequencerBase instance */
diff --git a/src/Base/Stream.cpp b/src/Base/Stream.cpp
index 8c7b94b6b0..5c4c4a7fbd 100644
--- a/src/Base/Stream.cpp
+++ b/src/Base/Stream.cpp
@@ -239,7 +239,7 @@ std::streambuf::int_type
 ByteArrayOStreambuf::overflow(std::streambuf::int_type c)
 {
     if (c != EOF) {
-        char z = c;
+        char z = static_cast<char>(c);
         if (_buffer->write (&z, 1) != 1) {
             return EOF;
         }
@@ -375,7 +375,7 @@ std::streambuf::int_type
 IODeviceOStreambuf::overflow(std::streambuf::int_type c)
 {
     if (c != EOF) {
-        char z = c;
+        char z = static_cast<char>(c);
         if (device->write (&z, 1) != 1) {
             return EOF;
         }
@@ -601,7 +601,7 @@ PyStreambuf::overflow(PyStreambuf::int_type ch)
 #ifdef PYSTREAM_BUFFERED
     sync();
     if (ch != traits_type::eof()) {
-        *pptr() = ch;
+        *pptr() = static_cast<char>(ch);
         pbump(1);
         return ch;
     }
diff --git a/src/Base/Stream.h b/src/Base/Stream.h
index 399a555a71..5ebba8999b 100644
--- a/src/Base/Stream.h
+++ b/src/Base/Stream.h
@@ -52,6 +52,8 @@ public:
 
 protected:
     Stream();
+    Stream(const Stream&) = default;
+    Stream& operator=(const Stream&) = default;
     virtual ~Stream();
 
     bool _swap;
@@ -147,6 +149,10 @@ protected:
         std::ios_base::openmode which =
             std::ios::in | std::ios::out);
 
+private:
+    ByteArrayOStreambuf(const ByteArrayOStreambuf&);
+    ByteArrayOStreambuf& operator=(const ByteArrayOStreambuf&);
+
 private:
     QBuffer* _buffer;
 };
@@ -174,6 +180,9 @@ protected:
     virtual pos_type seekpos(std::streambuf::pos_type pos,
         std::ios_base::openmode which =
             std::ios::in | std::ios::out);
+private:
+    ByteArrayIStreambuf(const ByteArrayIStreambuf&);
+    ByteArrayIStreambuf& operator=(const ByteArrayIStreambuf&);
 
 private:
     const QByteArray& _buffer;
@@ -201,6 +210,10 @@ protected:
     virtual pos_type seekpos(std::streambuf::pos_type sp,
         std::ios_base::openmode which =
             std::ios::in | std::ios::out);
+private:
+    IODeviceOStreambuf(const IODeviceOStreambuf&);
+    IODeviceOStreambuf& operator=(const IODeviceOStreambuf&);
+
 protected:
     QIODevice* device;
 };
@@ -225,6 +238,9 @@ protected:
     virtual pos_type seekpos(std::streambuf::pos_type sp,
         std::ios_base::openmode which =
             std::ios::in | std::ios::out);
+private:
+    IODeviceIStreambuf(const IODeviceIStreambuf&);
+    IODeviceIStreambuf& operator=(const IODeviceIStreambuf&);
 
 protected:
     QIODevice* device;
@@ -270,6 +286,10 @@ private:
     bool flushBuffer();
     bool writeStr(const char* s, std::streamsize num);
 
+private:
+    PyStreambuf(const PyStreambuf&);
+    PyStreambuf& operator=(const PyStreambuf&);
+
 private:
     PyObject* inp;
     Type type;
@@ -296,6 +316,10 @@ protected:
         std::ios_base::openmode which =
             std::ios::in | std::ios::out);
 
+private:
+    Streambuf(const Streambuf&);
+    Streambuf& operator=(const Streambuf&);
+
 private:
     std::string::const_iterator _beg;
     std::string::const_iterator _end;