question

The nodes are of the "Simple Data Type". You can use the command "getsdtvalue()" to read data from them. Although be aware that the developers do not guarantee compatability for future versions as the data format inside the node might change.

https://docs.flexsim.com/en/21.1/Reference/CodingInFlexSim/CommandReference/Commands.html

Here's an example code that sums up the traversals per grid and writes them to "GlobalTable1".

treenode extraData = Model.find("AStarNavigator>stats/extraData");
Table tab = Table("GlobalTable1");

// Reset Table
tab.setSize(1, 1);
tab[1][1] = 0;

// Count traversals per grid
for(int index = 1; index <= extraData.subnodes.length; index++)
{
   int grid = getsdtvalue(extraData.subnodes[index], "Grid");
   double traversals = getsdtvalue(extraData.subnodes[index], "totalTraversals");

   while(tab.numRows < grid)
   {
      tab.addRow();
      tab[tab.numRows][1] = 0;
   }

   tab[grid][1] += traversals;
}