diff --git a/backend_qt/qzint.cpp b/backend_qt/qzint.cpp
index cd2b8637..ee12d6b3 100644
--- a/backend_qt/qzint.cpp
+++ b/backend_qt/qzint.cpp
@@ -220,6 +220,10 @@ namespace Zint {
     void QZint::setSecurityLevel(int securityLevel) {
         m_securityLevel = securityLevel;
     }
+    
+    int QZint::getError() {
+        return m_error;
+    }
 
     QString QZint::error_message() const {
         return m_lastError;
@@ -275,14 +279,12 @@ namespace Zint {
         QByteArray bgcol = bg_colour_hash.right(6).toLatin1();
         strcpy(m_zintSymbol->fgcolour, fgcol.data());
         strcpy(m_zintSymbol->bgcolour, bgcol.data());
-        int error = ZBarcode_Encode_and_Print(m_zintSymbol, (unsigned char*) bstr.data(), bstr.length(), 0);
-        if (error > ZINT_WARN_INVALID_OPTION) {
+        m_error = ZBarcode_Encode_and_Print(m_zintSymbol, (unsigned char*) bstr.data(), bstr.length(), 0);
+        if (m_error != 0) {
             m_lastError = m_zintSymbol->errtxt;
-        }
-        if (error == 0) {
-            return true;
-        } else {
             return false;
+        } else {
+            return true;
         }
     }
 
diff --git a/backend_qt/qzint.h b/backend_qt/qzint.h
index 48331a8d..ec154f35 100644
--- a/backend_qt/qzint.h
+++ b/backend_qt/qzint.h
@@ -70,6 +70,8 @@ public:
 
     int securityLevel() const;
 	void setSecurityLevel(int securityLevel);
+        
+        int getError();
 
     float scale() const;
 	void setScale(float scale);
diff --git a/frontend_qt/mainwindow.cpp b/frontend_qt/mainwindow.cpp
index ace69705..60c34beb 100644
--- a/frontend_qt/mainwindow.cpp
+++ b/frontend_qt/mainwindow.cpp
@@ -247,8 +247,13 @@ bool MainWindow::save()
         }
 
 	if(m_bc.bc.save_to_file(filename) == false) {
+            if (m_bc.bc.getError() > 4) {
 		QMessageBox::critical(this,tr("Save Error"),m_bc.bc.error_message());
                 return false;
+            } else {
+                QMessageBox::warning(this, tr("Save Warning"),m_bc.bc.error_message());
+                return true;
+            }
 	}
 
         settings.setValue("studio/default_dir", filename.mid(0, filename.lastIndexOf(QDir::separator())));
@@ -920,14 +925,24 @@ void MainWindow::update_preview()
 				m_bc.bc.setInputMode(GS1_MODE);
 
 			m_bc.bc.setWidth(m_optionWidget->findChild<QComboBox*>("cmbDM200Size")->currentIndex());
-			if(m_optionWidget->findChild<QCheckBox*>("chkDMRectangle")->isChecked())
-				m_bc.bc.setOption3(DM_SQUARE);
-			else {
-				if(m_optionWidget->findChild<QCheckBox*>("chkDMRE")->isChecked())
-					m_bc.bc.setOption3(DM_DMRE);
-				else
-					m_bc.bc.setOption3(0);
-			}
+                        
+                        if (m_optionWidget->findChild<QComboBox*>("cmbDM200Size")->currentIndex() == 0) {
+                            // Supressing rectangles or allowing DMRE only makes sense if in automatic size mode
+                            findChild<QCheckBox*>("chkDMRectangle")->setEnabled(true);
+                            findChild<QCheckBox*>("chkDMRE")->setEnabled(true);
+                            if(m_optionWidget->findChild<QCheckBox*>("chkDMRectangle")->isChecked())
+                                    m_bc.bc.setOption3(DM_SQUARE);
+                            else {
+                                    if(m_optionWidget->findChild<QCheckBox*>("chkDMRE")->isChecked())
+                                            m_bc.bc.setOption3(DM_DMRE);
+                                    else
+                                            m_bc.bc.setOption3(0);
+                            }
+                        } else {
+                            findChild<QCheckBox*>("chkDMRectangle")->setEnabled(false);
+                            findChild<QCheckBox*>("chkDMRE")->setEnabled(false);
+                            m_bc.bc.setOption3(0);
+                        }
 			break;
 
 		case BARCODE_QRCODE: