Hi,
In the attached model you can see a milestone collector where the additional columns is updated sometimes, but also sometimes not. Maybe this problem is related to:
Not updating value expression in additional columns MilestoneCollector - FlexSim Community
But maybe it is something different.
The outcome of the collector is:
Where I would expect all rows for the last column to be filled.
Thanks
In the current state of the model, I believe this isn't as much a bug as an unintended side effect/timing issue. When the tracked item is destroyed, the respective row is automatically finished. At this point, the update mode When Value Is Accessed stops to work, so if the column was not filled in yet in will remain blank. If the column is filled in or not depends on the run speed. At high speeds almost all rows are blank in Column 1.
What does appear to be a bug is that the other update mode (When the row is added...) does not seem to function at all. I was able to get it to work by manually adding a coupling between the column's events node and the On Exit event's columns node.
You need to do two things. First, when an item has hit its last milestone, it's always best to check this box on the milestone:
Second, you should change the column code as follows:
collector.getValue( data.rowNum, 3, 1 ) - collector.getValue( data.rowNum, 2, 1 )
This resolves the issue in your case.
The additional argument tells the stats collector that it doesn't need to update all the other active rows before retrieving the value. It is a bug that not passing it corrupts the "data" object, but it is also a performance advantage to skip the update if you can.
There is currently a bug where applying column code requires you change the Update Mode away from "When accessed" and back again. Then click the Apply and OK buttons.
I'm adding both bugs to the dev list.
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