A customer found an issue when creating task executer flow items into a queue connected to a network node. Please see the attached model. What makes this issue interesting is that it seems to break on some flow items, but not all of them, and after a while the error cannot be reproduced unless you restart FlexSim. So it sounds like some sort of uninitialized memory issue. It breaks in both Update 1 and the beta of Update 2.
Wow, you're not kidding. Not only does the model break, but (at least in my case) it caused FlexSim itself to crash. I'll let the developers know to look at this one.
It looks like the bug is happening because of the timing of what is happening in the Create Object activity. Once the exception has happened, the unload task isn't working correctly for any of the task executer flowitems until FlexSim is closed and restarted. We'll look into it.
In the meantime, you can work around this issue by creating the flowitems in a processor with 0 processing time instead of a queue (or upstream, feeding the queue), rather than creating them in the queue directly. This will ensure that the Create Object activity event is completely finished before trying to send the task executer flowitem in the Request Transport field. See the attached sample model. createteflowiteminqueue-workaround.fsm
You can also use the Create Object activity to create flowitems directly attached to the network by selecting a network node as the "Create In" object. This way, you can create the items and give them tasks directly from Process Flow rather than using the Task Executer as Flowitem picklist option in the queue. See the attached sample model. createteflowitem-alternativemethod.fsm
Thanks Phil, we did figure out the workaround of creating it in an upstream queue. Glad that you found the cause.
Don't know when you fixed the bug, but it definitely works in 17.2.1.
Yes, this was fixed in 17.0.8 / 17.1.5 / 17.2.0.
17.0.8 release note:
7 People are following this question.
FlexSim can help you understand and improve any system or process. Transform your existing data into accurate predictions.
FlexSim is a fully 3D simulation software environment. FlexSim can be used to simulate any process in any industry.
FlexSim®, FlexSim Healthcare™, Problem Solved.®, the FlexSim logo, the FlexSim X-mark, and the FlexSim Healthcare logo with stylized Caduceus mark are trademarks of FlexSim Software Products, Inc. All rights reserved.
