DataCenter dc is null

[amiribrahim]

Tried to run the examples but getting the below error (tried both master and latest release 2.0.1-beta).
The mvn clean install finished successfully.
using java 1.8, with eclipse Version: 2021-09 (4.21.0)

============= SDNBroker.printResult() Group analysis =======================
Group num: 0, groupNumWorkloads:114
Group num: 0, groupTotalServetime:330.2069866666666
Group num: 0, groupTotalServetimeCPU:188.06399999999994
Group num: 0, groupTotalServetimeNetwork:142.14298666666662
Group num: 0, group avg Serve time:2.8965525146198825
Group num: 0, group avg Serve time CPU:1.6496842105263152
Group num: 0, group avg Serve time Network:1.2468683040935669
103.0: ========== EXPERIMENT FINISHED ===========
java.lang.NullPointerException: Cannot invoke "org.cloudbus.cloudsim.sdn.physicalcomponents.SDNDatacenter.getNOS()" because "dc" is null
	at org.cloudbus.cloudsim.sdn.example.SimpleExampleInterCloud.getAllHostList(SimpleExampleInterCloud.java:212)
	at org.cloudbus.cloudsim.sdn.example.SimpleExampleInterCloud.startSimulation(SimpleExampleInterCloud.java:192)
	at org.cloudbus.cloudsim.sdn.example.SimpleExampleInterCloud.main(SimpleExampleInterCloud.java:168)
Unwanted errors happen 

[amiribrahim]

After investigation, this is happening because the datacenter of type: net doesn't have PEs!

java.lang.Exception: net : Error - this entity has no PEs. Therefore, can't process any Cloudlets.
	at org.cloudbus.cloudsim.Datacenter.<init>(Datacenter.java:104)
	at org.cloudbus.cloudsim.sdn.physicalcomponents.SDNDatacenter.<init>(SDNDatacenter.java:61)
	at org.cloudbus.cloudsim.sdn.example.SimpleExampleInterCloud.createSDNDatacenter(SimpleExampleInterCloud.java:293)
	at org.cloudbus.cloudsim.sdn.example.SimpleExampleInterCloud.createPhysicalTopology(SimpleExampleInterCloud.java:231)
	at org.cloudbus.cloudsim.sdn.example.SimpleExampleInterCloud.main(SimpleExampleInterCloud.java:152)

Still need your help to get the example running without such error or the subsequent runtime error that happens when getting AllHostList and AllSwitchList that belong to a null datacenter!