need assistance with pip3 install ./model/ns3gym

[Palalani Palalani]

i am trying to install ns3gym but i get an error below when i run command in the subject, i tried to run ./ns3 configure in /ns-allinone-3.42/ns-3.42  this error till persists, please assist

[압둘하미드이드리스]

Hi Palalani:

If you see something like:

File: ns3-gym/src/opengym/model/ns3gym/ns3gym/messages_pb2.py was not found

even after running ./ns3 configure, try this:

1. Install protobufs

sudo apt update
sudo apt install -y protobuf-compiler libprotobuf-dev
protoc --version  # should show 3.x.x

2. Clean & rebuild ns-3

cd ns-3.42
./waf clean
./waf configure --enable-examples --enable-tests
./waf build

3. Generate Python protobuf manually (if needed)

cd src/opengym/model/ns3gym/ns3gym/
protoc --python_out=. messages.proto

4. Install ns3gym

cd ../../../contrib/opengym
pip install -e .

After that, messages_pb2.py should exist, and the install should work fine. (GPT: Source), although modified.

On Wed, Nov 19, 2025 at 5:39 AM Palalani Palalani <phi...@gmail.com> wrote:

i am trying to install ns3gym but i get an error below when i run command in the subject, i tried to run ./ns3 configure in /ns-allinone-3.42/ns-3.42  this error till persists, please assist

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Idris Adedamola Abdulhameed, M.Sc.
Ph.D. Candidate, School of Computer Science and Engineering, Kyungpook National University | Lecturer II (on Study Leave), The Polytechnic, Ibadan, Nigeria

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📧 Emails: iaabdu...@knu.ac.kr | abdulhamee...@polyibadan.edu.ng | iabdul...@pgschool.lautech.edu.ng | iaabdu...@ieee.org
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[Palalani Palalani]

Hi Idris

thank you for your quick response, i ran commands 1,3 & 4 3 failed and gave me a work sound which i did then i got the error below when running pip install -e

whats your take should i proceed with the recommendation? by the way i am looking for a mentor, i am doing msc in computing with a research topic on TCP congestion management.

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[압둘하미드이드리스]

Yes, you need to follow that instruction to create the environment virtually, 

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[Palalani Palalani]

everything worked out, thanx all

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