diff --git a/qucs/extsimkernels/s2spice.cpp b/qucs/extsimkernels/s2spice.cpp
index 73294a994..626b7f4cd 100644
--- a/qucs/extsimkernels/s2spice.cpp
+++ b/qucs/extsimkernels/s2spice.cpp
@@ -77,6 +77,7 @@ bool S2Spice::convertTouchstone(QTextStream *stream)
 
    QString next_line;
    while(in_stream.readLineInto(&next_line)) {
+       if (next_line.isEmpty()) continue;
        if (next_line.at(0) == '#') break;
    }
 
@@ -130,6 +131,11 @@ bool S2Spice::convertTouchstone(QTextStream *stream)
     while(in_stream.readLineInto(&next_line)) {
         if(next_line.isEmpty()) continue;
         if(next_line.at(0)=='#') continue;
+        if(next_line.startsWith("!noise parameters")) {
+            err_text = "Noise simulation in S2P files is not supported!\n"
+                       "Noise data ignored";
+            break;
+        }
         if(next_line.at(0)=='!') continue;
         tmp_lst = next_line.split(QRegularExpression("[ \\t]"), qucs::SkipEmptyParts);
         if (tmp_lst.count() < 2*(ports*ports)+1) {
diff --git a/qucs/schematic_file.cpp b/qucs/schematic_file.cpp
index 49ad1564a..e30f20f49 100644
--- a/qucs/schematic_file.cpp
+++ b/qucs/schematic_file.cpp
@@ -1464,10 +1464,13 @@ bool Schematic::throughAllComps(QTextStream *stream, int& countInit,
         S2Spice *conv = new S2Spice();
         conv->setFile(f);
         conv->setDeviceName(sub_name);
-        if (!conv->convertTouchstone(stream)) {
-            QMessageBox::warning(this,tr("Netlist error"),
-                                 conv->getErrText());
+        bool r = conv->convertTouchstone(stream);
+        QString msg = conv->getErrText();
+        if (!r) {
+            QMessageBox::warning(this,tr("Netlist error"), msg);
             return false;
+        } else if (!msg.isEmpty()) {
+            QMessageBox::warning(this,tr("S2Spice warning"), msg);
         }
         delete conv;
     }