diff --git a/README.md b/README.md
index 5fcdf07..bcdf61e 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 # RepRaptor
 A Qt RepRap gcode sender/host controller aimed to be fast and minimalistic.
 
-Right now the project is in early stage, nigtly builds are available.
+Right now the project is in early stage.
 
 ## Screenshots
 ![RepRaptor printing a file](http://reprap.org/mediawiki/images/2/2d/RepRaptor_screenshot0.png)
diff --git a/RepRaptor.pro b/RepRaptor.pro
index d856118..44ef6c1 100644
--- a/RepRaptor.pro
+++ b/RepRaptor.pro
@@ -16,15 +16,20 @@ CONFIG += static
 SOURCES += main.cpp\
         mainwindow.cpp \
     settingswindow.cpp \
-    aboutwindow.cpp
+    aboutwindow.cpp \
+    errorwindow.cpp \
+    erroricon.cpp
 
 HEADERS  += mainwindow.h \
     settingswindow.h \
-    aboutwindow.h
+    aboutwindow.h \
+    errorwindow.h \
+    erroricon.h
 
 FORMS    += mainwindow.ui \
     settingswindow.ui \
-    aboutwindow.ui
+    aboutwindow.ui \
+    errorwindow.ui
 
 RESOURCES += \
     graphics.qrc
diff --git a/erroricon.cpp b/erroricon.cpp
new file mode 100644
index 0000000..7bd00fc
--- /dev/null
+++ b/erroricon.cpp
@@ -0,0 +1,38 @@
+#include "erroricon.h"
+
+ErrorIcon::ErrorIcon(QWidget *parent) : QWidget(parent)
+{
+    framenum = 0;
+    frame = ":icons/error_a.png";
+    animation.setInterval(300);
+    animation.start();
+
+    connect(&animation, SIGNAL(timeout()), this, SLOT(changeFrame()));
+}
+
+void ErrorIcon::paintEvent(QPaintEvent *pe)
+{
+    QPainter painter(this);
+    painter.drawPixmap(0,0,128,87,QPixmap(frame));
+}
+
+void ErrorIcon::changeFrame()
+{
+    if(framenum == 0)
+    {
+        frame = ":icons/error_a.png";
+        framenum = 1;
+    }
+    else if(framenum == 1)
+    {
+        frame = ":icons/error_b.png";
+        framenum = 0;
+    }
+    this->update();
+}
+
+ErrorIcon::~ErrorIcon()
+{
+
+}
+
diff --git a/erroricon.h b/erroricon.h
new file mode 100644
index 0000000..c338334
--- /dev/null
+++ b/erroricon.h
@@ -0,0 +1,27 @@
+#ifndef ERRORICON_H
+#define ERRORICON_H
+
+#include <QWidget>
+#include <QTimer>
+#include <QPainter>
+
+class ErrorIcon : public QWidget
+{
+    Q_OBJECT
+public:
+    explicit ErrorIcon(QWidget *parent = 0);
+    ~ErrorIcon();
+    QTimer animation;
+    QString frame;
+    int framenum;
+
+protected:
+    virtual void paintEvent(QPaintEvent *pe);
+
+signals:
+
+public slots:
+    void changeFrame();
+};
+
+#endif // ERRORICON_H
diff --git a/errorwindow.cpp b/errorwindow.cpp
new file mode 100644
index 0000000..c6787df
--- /dev/null
+++ b/errorwindow.cpp
@@ -0,0 +1,15 @@
+#include "errorwindow.h"
+#include "ui_errorwindow.h"
+
+ErrorWindow::ErrorWindow(QWidget *parent, QString errorText) :
+    QDialog(parent),
+    ui(new Ui::ErrorWindow)
+{
+    ui->setupUi(this);
+    ui->errorlabel->setText(errorText);
+}
+
+ErrorWindow::~ErrorWindow()
+{
+    delete ui;
+}
diff --git a/errorwindow.h b/errorwindow.h
new file mode 100644
index 0000000..20a8558
--- /dev/null
+++ b/errorwindow.h
@@ -0,0 +1,24 @@
+#ifndef ERRORWINDOW_H
+#define ERRORWINDOW_H
+
+#include <QDialog>
+
+#include "erroricon.h"
+
+namespace Ui {
+class ErrorWindow;
+}
+
+class ErrorWindow : public QDialog
+{
+    Q_OBJECT
+
+public:
+    explicit ErrorWindow(QWidget *parent = 0, QString errorText = "Unknown error");
+    ~ErrorWindow();
+
+private:
+    Ui::ErrorWindow *ui;
+};
+
+#endif // ERRORWINDOW_H
diff --git a/errorwindow.ui b/errorwindow.ui
new file mode 100644
index 0000000..e8f9d3c
--- /dev/null
+++ b/errorwindow.ui
@@ -0,0 +1,130 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<ui version="4.0">
+ <class>ErrorWindow</class>
+ <widget class="QDialog" name="ErrorWindow">
+  <property name="geometry">
+   <rect>
+    <x>0</x>
+    <y>0</y>
+    <width>350</width>
+    <height>139</height>
+   </rect>
+  </property>
+  <property name="windowTitle">
+   <string>Error</string>
+  </property>
+  <widget class="QDialogButtonBox" name="buttonBox">
+   <property name="geometry">
+    <rect>
+     <x>90</x>
+     <y>100</y>
+     <width>171</width>
+     <height>32</height>
+    </rect>
+   </property>
+   <property name="orientation">
+    <enum>Qt::Horizontal</enum>
+   </property>
+   <property name="standardButtons">
+    <set>QDialogButtonBox::Cancel|QDialogButtonBox::Ok</set>
+   </property>
+   <property name="centerButtons">
+    <bool>true</bool>
+   </property>
+  </widget>
+  <widget class="ErrorIcon" name="widget" native="true">
+   <property name="geometry">
+    <rect>
+     <x>10</x>
+     <y>10</y>
+     <width>128</width>
+     <height>87</height>
+    </rect>
+   </property>
+   <property name="sizePolicy">
+    <sizepolicy hsizetype="Fixed" vsizetype="Fixed">
+     <horstretch>0</horstretch>
+     <verstretch>0</verstretch>
+    </sizepolicy>
+   </property>
+   <property name="maximumSize">
+    <size>
+     <width>128</width>
+     <height>87</height>
+    </size>
+   </property>
+  </widget>
+  <widget class="QLabel" name="label">
+   <property name="geometry">
+    <rect>
+     <x>180</x>
+     <y>10</y>
+     <width>121</width>
+     <height>31</height>
+    </rect>
+   </property>
+   <property name="text">
+    <string>Serial port error:</string>
+   </property>
+   <property name="textFormat">
+    <enum>Qt::AutoText</enum>
+   </property>
+  </widget>
+  <widget class="QLabel" name="errorlabel">
+   <property name="geometry">
+    <rect>
+     <x>180</x>
+     <y>40</y>
+     <width>151</width>
+     <height>41</height>
+    </rect>
+   </property>
+   <property name="text">
+    <string>NaN</string>
+   </property>
+  </widget>
+ </widget>
+ <customwidgets>
+  <customwidget>
+   <class>ErrorIcon</class>
+   <extends>QWidget</extends>
+   <header location="global">erroricon.h</header>
+   <container>1</container>
+  </customwidget>
+ </customwidgets>
+ <resources/>
+ <connections>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>accepted()</signal>
+   <receiver>ErrorWindow</receiver>
+   <slot>accept()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>248</x>
+     <y>254</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>157</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+  <connection>
+   <sender>buttonBox</sender>
+   <signal>rejected()</signal>
+   <receiver>ErrorWindow</receiver>
+   <slot>reject()</slot>
+   <hints>
+    <hint type="sourcelabel">
+     <x>316</x>
+     <y>260</y>
+    </hint>
+    <hint type="destinationlabel">
+     <x>286</x>
+     <y>274</y>
+    </hint>
+   </hints>
+  </connection>
+ </connections>
+</ui>
diff --git a/graphics.qrc b/graphics.qrc
index 758ce20..1cfb75b 100644
--- a/graphics.qrc
+++ b/graphics.qrc
@@ -2,5 +2,7 @@
     <qresource prefix="/">
         <file>icons/icon.png</file>
         <file>icons/logo.png</file>
+        <file>icons/error_a.png</file>
+        <file>icons/error_b.png</file>
     </qresource>
 </RCC>
diff --git a/icons/error_a.png b/icons/error_a.png
new file mode 100644
index 0000000..b9f6252
Binary files /dev/null and b/icons/error_a.png differ
diff --git a/icons/error_b.png b/icons/error_b.png
new file mode 100644
index 0000000..964f9b3
Binary files /dev/null and b/icons/error_b.png differ
diff --git a/mainwindow.cpp b/mainwindow.cpp
index e901808..ce62a46 100644
--- a/mainwindow.cpp
+++ b/mainwindow.cpp
@@ -39,6 +39,7 @@ MainWindow::MainWindow(QWidget *parent) :
 
     serialupdate();
 
+    connect(&printer, SIGNAL(error(QSerialPort::SerialPortError)), this, SLOT(serialError(QSerialPort::SerialPortError)));
     connect(&printer, SIGNAL(readyRead()), this, SLOT(readSerial()));
     connect(&statusTimer, SIGNAL(timeout()), this, SLOT(checkStatus()));
     connect(&sendTimer, SIGNAL(timeout()), this, SLOT(sendNext()));
@@ -199,6 +200,7 @@ void MainWindow::serialconnect()
         ui->progressBar->setValue(0);
         ui->controlBox->setDisabled(true);
         ui->consoleGroup->setDisabled(true);
+
      }
 }
 
@@ -440,6 +442,7 @@ void MainWindow::sendNext()
             currentLine = 0;
             ui->sendBtn->setText("Send");
             ui->pauseBtn->setDisabled("true");
+            ui->filelines->setText(QString::number(gcode.size()) + QString("/") + QString::number(currentLine) + QString(" Lines"));
             return;
         }
         sendLine(gcode.at(currentLine));
@@ -505,5 +508,59 @@ void MainWindow::injectCommand(QString command)
 
 void MainWindow::updateRecent()
 {
-
+    //TODO
+}
+
+void MainWindow::serialError(QSerialPort::SerialPortError error)
+{
+    if(error == QSerialPort::NoError) return;
+
+    if(printer.isOpen()) printer.close();
+
+    if(sending) paused = true;
+
+    ui->connectBtn->setText("Connect");
+    ui->sendBtn->setDisabled(true);
+    ui->pauseBtn->setDisabled(true);
+    ui->progressBar->setValue(0);
+    ui->controlBox->setDisabled(true);
+    ui->consoleGroup->setDisabled(true);
+
+    qDebug() << error;
+
+    QString errorMsg;
+    switch(error)
+    {
+    case QSerialPort::DeviceNotFoundError:
+        errorMsg = "Device not found";
+        break;
+
+    case QSerialPort::PermissionError:
+        errorMsg = "Insufficient permissions\nAlready opened?";
+        break;
+
+    case QSerialPort::OpenError:
+        errorMsg = "Cant open port\nAlready opened?";
+        break;
+
+    case QSerialPort::TimeoutError:
+        errorMsg = "Serial connection timed out";
+        break;
+
+    case QSerialPort::WriteError:
+    case QSerialPort::ReadError:
+        errorMsg = "I/O Error";
+        break;
+
+    case QSerialPort::ResourceError:
+        errorMsg = "Disconnected";
+        break;
+
+    default:
+        errorMsg = "Unknown error\nSomething went wrong";
+        break;
+    }
+
+    ErrorWindow errorwindow(this, errorMsg);
+    errorwindow.exec();
 }
diff --git a/mainwindow.h b/mainwindow.h
index 9b57a8f..a5f6d91 100644
--- a/mainwindow.h
+++ b/mainwindow.h
@@ -14,6 +14,7 @@
 
 #include "settingswindow.h"
 #include "aboutwindow.h"
+#include "errorwindow.h"
 
 
 namespace Ui {
@@ -95,6 +96,7 @@ private slots:
     void on_actionSettings_triggered();
     void on_releasebtn_clicked();
     void on_actionAbout_triggered();
+    void serialError(QSerialPort::SerialPortError error);
 };
 
 #endif // MAINWINDOW_H