question

You could try increasing the size of your non-interactive desktop heap as described in the webserver pages of the manual.

Hmm. I don't know how much more we can debug without a model. Here's one more thing to try, that's maybe more direct that what you tried before:

1. Open your original model. Save it as a new model, for this debugging test.
2. Apply the scenario/replication that gets stuck, as you did before
3. Close all the windows except the FlexSim application.
4. Run the model to the end at max speed.
5. Run this script in a Script Console:

Map task;
task.scenarioID = 1;
task.replication = 1;
function_s(Model.find("Tools/Experimenter"), "packResults", task);

This is the exact code that fires at the end of a replication. Does it throw exceptions? If not, then you'll need to provide your model for further debugging.

Another thought I had while writing this is that deleting charts doesn't always delete all the parts of the chart. Sometimes, invisible charts are running in the background. Here is a script to delete those. Then try running the experiment again, to see if the issue is resolved.

treenode statisticsFolder = Model.find("Tools/Statistics");
Array usedStatsObjects;
var dashboards = Model.find("Tools/Dashboards").subnodes;
for (int d = 1; d <= dashboards.length; d++) {
    var widgets = dashboards[d].subnodes;
    for (int w = 1; w <= widgets.length; w++) {
        Object widget = widgets[w];
        treenode saver = widget.attrs.find("saver");
        treenode storedNode = widget.attrs.find("stored");
        if (saver && saver.value == "DashboardWebStatGraph" && storedNode) {
            var storedLinks = storedNode.subnodes;
            for (int s = 1; s <= storedLinks.length; s++) {
                treenode linkedNode = storedLinks[s].find("+/~");
                if (linkedNode && linkedNode.up == statisticsFolder) {
                    usedStatsObjects.push(linkedNode);
                }
            }
        }
    }
}
var statsObjects = statisticsFolder.subnodes;
for (int i = statsObjects.length; i >= 1; i--) {
    treenode statsObject = statsObjects[i];
    if (usedStatsObjects.indexOf(statsObject) <= 0) {
        print(statsObject);
        // statsObject.destroy();
    }
}