allow initial comments in dat-files.

src/musredit_qt5/mupp/Pmupp.cpp

@@ -594,7 +594,12 @@ PmuppCollection PParamDataHandler::ReadColumnParamFile(const QString fln, bool &
   run.SetName(fln);
 
   // read header information
+  // step over initial comments
   line = in.readLine();
+  while (line.isEmpty() || line.startsWith("%") || line.startsWith("#"))
+      line = in.readLine();
+
+  // handle header
 #if (QT_VERSION < QT_VERSION_CHECK(5, 14, 0))
   token = line.split(QRegExp("\\s+"), QString::SkipEmptyParts);
 #else

src/musredit_qt6/mupp/Pmupp.cpp

@@ -702,7 +702,12 @@ PmuppCollection PParamDataHandler::ReadColumnParamFile(const QString fln, bool &
   run.SetName(fln);
 
   // read header information
+  // step over initial comments
   line = in.readLine();
+  while (line.isEmpty() || line.startsWith("%") || line.startsWith("#"))
+    line = in.readLine();
+
+  // handle header
   token = line.split(QRegularExpression("\\s+"), Qt::SkipEmptyParts);
 
   QVector<QString> headerInfo;