Message Following Delay Activity Observation

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Stan Davis asked Mar 21, '23 Stan Davis commented Mar 21, '23

Message Following Delay Activity Observation

While developing another model, I observed a peculiar behaviour with messages and delay activities.

I attached a simple model demonstrating behaviour.

Using a process flow, a token arrives at 12:00 am 1/1/2024.

A message is immediately displayed showing Model.dateTime.dayOfWeek.

This is followed by a delay of 1440 minutes before the another message is displayed also showing Model.dateTime.dayOfWeek.

However, the 2nd message is shown before the delay activity completes in the Process Flow. Why is this?? The run speed greatly affects this observation.

The token then moves to the 2nd message activity at the correct time...

Note that this is observed with both minutes and seconds model time units.

Thanks

Message Following Delay Observation - 21MAR23.fsm

Software Version:

FlexSim 23.0.5

delaytime messages

1679418060751.png (18.4 KiB)

1679418611551.png (13.2 KiB)

1679419520389.png (61.3 KiB)

message-following-delay-observation-21mar23.fsm (27.6 KiB)

Answer 1 · 2023-03-21T18:00:51Z

Jordan Johnson answered Mar 21, '23 Stan Davis commented Mar 21, '23

Alert boxes prevent the Process Flow view from being repainted. The token appears to be on the Delay activity because that was where it was last painted before the alert appeared.

If you change the second Custom Code to contain this line:

msg("Message 2", string.fromNum(Model.dateTime.dayOfWeek) + " " + token.activity.name);

You'll see that the alert box reports that the token is currently in the "Show Day of Week" activity, not the "Delay" activity.

· 1

Stan Davis commented · Mar 21, 2023 at 06:48 PM

Thanks for the clarification.

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