Could it be, that you posted this in the wrong product line ?
I guess you are talking about Opnet Modeller and not about SteelFusion, right ?
One comment I have found in a forum is:
When the setup of your platform is not appropriate (means for example
the link capacity is far bellow the requested traffic, for example),
such these errors occurs. "
In the Modeling Concepts document, the section on Executing Simulations includes the following Note:
Note-If your network model uses custom or customized process modules, you must disable the use of repositories before running the simulation. Do this by editing the repositories preference to delete all repositories.
I don't have the ZigBee(TM) model suite license, so I do not have any experience with the wpan models. I assume the model referenced below is custom. If not, are you sure you have access to the license?
I took a look in the 17.5.A folder and could not find a wpan module.
I hope this info helps. Sorry it comes so late in your project...