Error when running a scenario with Omnet+++ Federate

[LDVictor]

Hi all.

I'm having some dificulties when I try to run any scenario with Omnet++ setted as true in the scenario_config.json. I created the omnetpp directory inside scenario folder, with omnetpp.ini and omnetpp_config.json correctly configured, but when I run the scenario, this error occurs:

`09:35:42 - Simulating: 0ns (0.0s / 1000.0s) - 0.0% (RTF:0.00, ETC:unknown) 09:35:44 - Simulating: 0ns (0.0s / 1000.0s) - 0.0% (RTF:0.00, ETC:unknown)

Stopping simulation due to a critical error:
- NullPointerException: Could not read command.
- Root Cause: NullPointerException: Could not read command.
Please see the log files for details.
- Log-Directory: logs/log-20210415-093528-Barnim

Eclipse MOSAIC will now shutdown.
-------------------------------------------------------------------`

Someone can help me to understand what could cause this error? Thanks!

[realmaxneu]

This error message is quite uninformative. To help you with your issue we need a few more information. Could you please have a look into your scenario log directory logs/log-20210415-093528-Barnim and provide us some more log details?

[LDVictor]

Hi, thanks for responding me. I checked the log and the last lines are:
2021-05-12 18:56:19,528 INFO OmnetppAmbassadorOutput - Process org.eclipse.mosaic.fed.omnetpp.ambassador.OmnetppAmbassador : 0: ** Signal at T=0 to Simulation.rsu[0].networkLayer.routingTable: interfaceIpv4ConfigChanged wlan0 ID:100 MTU:2304 UP BROADCAST CARRIER MULTICAST macAddr:0A-AA-00-00-00-01 Ipv4:{inet_addr:10.2.0.0/16 mcastgrps:224.0.0.1,224.0.0.2} changed field: 1 2021-05-12 18:56:19,528 INFO OmnetppAmbassadorOutput - Process org.eclipse.mosaic.fed.omnetpp.ambassador.OmnetppAmbassador : 0: 2021-05-12 18:56:19,528 INFO OmnetppAmbassadorOutput - Process org.eclipse.mosaic.fed.omnetpp.ambassador.OmnetppAmbassador : 0: MosaicUDP send packet 2021-05-12 18:56:19,528 INFO OmnetppAmbassadorOutput - Process org.eclipse.mosaic.fed.omnetpp.ambassador.OmnetppAmbassador : 0: PcapDump::writeFrame 2021-05-12 18:56:19,528 INFO OmnetppAmbassadorOutput - Process org.eclipse.mosaic.fed.omnetpp.ambassador.OmnetppAmbassador : 0: Adicionando sendPacket no pcap 2021-05-12 18:56:19,528 INFO OmnetppAmbassadorOutput - Process org.eclipse.mosaic.fed.omnetpp.ambassador.OmnetppAmbassador : 0: PcapDump::writeFrame 2021-05-12 18:56:19,528 INFO OmnetppAmbassadorOutput - Process org.eclipse.mosaic.fed.omnetpp.ambassador.OmnetppAmbassador : 0: MosaicEventScheduler ended 2021-05-12 18:56:19,528 INFO OmnetppAmbassadorOutput - Process org.eclipse.mosaic.fed.omnetpp.ambassador.OmnetppAmbassador : undisposed object: (omnetpp_federate::MosaicAppPacket) Simulation.mgmt.V2xPacket-0 -- check module destructor 2021-05-12 18:56:19,528 INFO OmnetppAmbassadorOutput - Process org.eclipse.mosaic.fed.omnetpp.ambassador.OmnetppAmbassador : 0: Ipv4::flush(): pending packets: 2021-05-12 18:56:19,529 INFO OmnetppAmbassadorOutput - Process org.eclipse.mosaic.fed.omnetpp.ambassador.OmnetppAmbassador : 0: Ipv4::flush(): packets in hooks: 0 2021-05-12 18:56:19,529 INFO OmnetppAmbassadorOutput - Process org.eclipse.mosaic.fed.omnetpp.ambassador.OmnetppAmbassador : 0: Clear all sockets 2021-05-12 18:56:19,529 INFO OmnetppAmbassadorOutput - Process org.eclipse.mosaic.fed.omnetpp.ambassador.OmnetppAmbassador : undisposed object: (omnetpp_federate::MosaicAppPacket) Simulation.rsu[0].proxyApp.V2xPacket-0 -- check module destructor 2021-05-12 18:56:19,529 INFO OmnetppAmbassadorOutput - Process org.eclipse.mosaic.fed.omnetpp.ambassador.OmnetppAmbassador : undisposed object: (inet::Packet) Simulation.rsu[0].proxyApp.omnetpp_federate::MosaicAppPacket -- check module destructor 2021-05-12 18:56:19,529 INFO OmnetppAmbassadorOutput - Process org.eclipse.mosaic.fed.omnetpp.ambassador.OmnetppAmbassador : 2021-05-12 18:56:19,529 INFO OmnetppAmbassadorOutput - Process org.eclipse.mosaic.fed.omnetpp.ambassador.OmnetppAmbassador : End.

I did some a modification in MosaicProxyApp to PcapDump a packet. Do you know what may be happening?