Created attachment 3169 [details]
Example script

Hi, 

I have noticed that the UE MAC SAP, i.e., LteMacSapUser is not configured properly. As per the figures: https://www.nsnam.org/docs/models/html/lte-design.html#fig-ca-ue-data-plane and https://www.nsnam.org/docs/models/html/lte-design.html#fig-ca-ue-ctrl-plane, the calls from UE MAC to RLC should traverse through UE component carrier manager. However, the calls from MAC are directly landing in RLC, thus the functions, SimpleUeComponentCarrierManager::DoNotifyTxOpportunity and SimpleUeComponentCarrierManager::DoReceivePdu are never called. 

I am attaching an example script to observe the above-explained behavior. One can run the example as follows and check for the calls to above funtions, 

./waf --run "scratch/BugTracker-lena-simple-epc --useCa=1 --numBearersPerUe=2 --enableNsLogs=1" > SimpleUeCcmLogs.txt 2>&1

Kind regards,
Zoraze