How to connect many People to a Mandatory Path in AStar?

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Claire Krupp asked Feb 21, '19 Claire Krupp commented Feb 25, '19

How to connect many People to a Mandatory Path in AStar?

I have about 1000 people per shift, created by a Date-Time Source in Process Flow. I need them to take a mandatory path in a congested area. I set the condition on the path so that they should use it, but they are ignoring it. The manual says I have to set "Must Use Mandatory Paths" on the properties of the traveler object, but I can't do that as the people are not created yet. (And anyway there are 1000 of them so that is not feasible)

Is there a label or command that I have to use in the process flow logic to make them use mandatory paths?

Software Version:

FlexSim 19.0.0

astar people flow mandatory path

Answer 1 · 2019-02-21T23:34:55Z

Matthew Gillespie answered Feb 21, '19 Claire Krupp commented Feb 25, '19

We don't currently provide a command to do this, but this code snippet will do it:

treenode person = token.Person; 
treenode traveler = person.find(">variables/navigator/1+");
setsdtvalue(traveler, "useMandatoryPath", 1);

You could place this snippet in a custom code right after creating the person.

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Claire Krupp commented · Feb 22, 2019 at 08:17 PM

Thank you! I will try that.

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Claire Krupp commented · Feb 25, 2019 at 03:57 PM

Well it worked as far as checking the "Use Mandatory Paths" box, but then the behavior goes haywire as every single person jumps directly to the Mandatory Path, even though their desired path is not even close to this area. (It represents a staircase that some of them use to get to the Canteen for lunch.) They get stuck on the path and never get out again!

I have sent the model to [email protected].

Meanwhile I am going to find a different way to deal with the gridlock! Maye if I increase the Preferred Path "weight" it will work better?

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Phil BoBo ♦♦ Claire Krupp commented · Feb 25, 2019 at 04:34 PM

Mandatory paths are designed to work that way. If a traveler is using mandatory paths, then they only walk on mandatory paths. They never walk on nodes that aren't mandatory paths. This is useful for situations such as using AGVs on the A* network on certain paths in conjunction with people who can travel anywhere.

Yes, what you want is probably preferred paths, not mandatory paths.

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Claire Krupp Phil BoBo ♦♦ commented · Feb 25, 2019 at 09:45 PM

Thanks for the clarification. I misinterpreted the manual description.

The preferred paths are mostly working for what I need, although the people do seem to keep trying to get away from them!

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