python contrib/opengym/examples/opengym/simple_test.py Got new port for ns3gm interface: 7656 ns3 file not found. Quitting...

[TNaishithaReddy]

when I tried to test the working of ns3gym, im getting this error

python contrib/opengym/examples/opengym/simple_test.py
Got new port for ns3gm interface: 7656
ns3 file not found. Quitting...

I ran the following in other terminal
./waf --run contrib/opengym/examples/opengym
Waf: Entering directory /home/nishitha/installation1/ns-allinone-3.29/ns-3.29/build' Waf: Leaving directory /home/nishitha/installation1/ns-allinone-3.29/ns-3.29/build'
Build commands will be stored in build/compile_commands.json
'build' finished successfully (2.906s)
Ns3Env parameters:
--simulationTime: 1
--openGymPort: 5555
--envStepTime: 0.1
--seed: 1
--testArg: 0
Simulation start
MyGetObservationSpace: BoxSpace Low: 0 High: 10 Shape: (5,) Dtype: uint32_t
MyGetActionSpace: DiscreteSpace N: 5
Simulation process id: 23723 (parent (waf shell) id: 23712)
Waiting for Python process to connect on port: tcp://localhost:5555
Please start proper Python Gym Agent

Pls help me with the issue