fix ticket:5251, use secsTo instead of direct comparison

OMEdit/OMEditGUI/Simulation/SimulationDialog.cpp

@@ -1722,15 +1722,21 @@ void SimulationDialog::simulationProcessFinished(SimulationOptions simulationOpt
     return;
   }
   QString workingDirectory = simulationOptions.getWorkingDirectory();
+  QRegExp regExp("\\b(mat|plt|csv)\\b");
+  bool resultFileKnown = regExp.indexIn(simulationOptions.getFullResultFileName()) != -1;
   // read the result file
   QFileInfo resultFileInfo(QString(workingDirectory).append("/").append(simulationOptions.getFullResultFileName()));
-  QRegExp regExp("\\b(mat|plt|csv)\\b");
+  resultFileInfo.setCaching(false);
+  QDateTime resultFileModificationTime = resultFileInfo.lastModified();
+  bool resultFileExists = resultFileInfo.exists();
+  // use secsTo as lastModified returns to second not to mili/nanoseconds, see #5251
+  bool resultFileNewer = resultFileLastModifiedDateTime.secsTo(resultFileModificationTime) >= 0;
   /* ticket:4935 Check the simulation result size via readSimulationResultSize
    * If the result size is zero then don't switch to the plotting view.
    */
-  if (regExp.indexIn(simulationOptions.getFullResultFileName()) != -1 &&
-      resultFileInfo.exists() && resultFileLastModifiedDateTime <= resultFileInfo.lastModified() &&
-      MainWindow::instance()->getOMCProxy()->readSimulationResultSize(resultFileInfo.absoluteFilePath()) > 0) {
+  bool resultFileNonZeroSize = MainWindow::instance()->getOMCProxy()->readSimulationResultSize(resultFileInfo.absoluteFilePath()) > 0;
+
+  if (resultFileKnown && resultFileExists &&  resultFileNewer && resultFileNonZeroSize) {
     VariablesWidget *pVariablesWidget = MainWindow::instance()->getVariablesWidget();
     OMCProxy *pOMCProxy = MainWindow::instance()->getOMCProxy();
     QStringList list = pOMCProxy->readSimulationResultVars(resultFileInfo.absoluteFilePath());