Connection Error

[sinashm]

I am using Python 3.6 for opengen and I am getting following warning and the error. Does this problem due to virtualenv? The TCP IP is:

tcp_config = og.config.TcpServerConfiguration(bind_port=3300)        

WARNING:retry.api:[Errno 111] Connection refused, retrying in 1 seconds...
WARNING:retry.api:[Errno 111] Connection refused, retrying in 1 seconds...
WARNING:retry.api:[Errno 111] Connection refused, retrying in 1 seconds...
WARNING:retry.api:[Errno 111] Connection refused, retrying in 1 seconds...
WARNING:retry.api:[Errno 111] Connection refused, retrying in 1 seconds...
WARNING:retry.api:[Errno 111] Connection refused, retrying in 1 seconds...
WARNING:retry.api:[Errno 111] Connection refused, retrying in 1 seconds...
WARNING:retry.api:[Errno 111] Connection refused, retrying in 1 seconds...
WARNING:retry.api:[Errno 111] Connection refused, retrying in 1 seconds...
Traceback (most recent call last):
  File "code_run_ros.py", line 21, in <module>
    mhe.start()
  File "/home/pixy/python-environments/env/lib/python3.6/site-packages/opengen/tcp/optimizer_tcp_manager.py", line 110, in start
    self.ping()
  File "/home/pixy/python-environments/env/lib/python3.6/site-packages/opengen/tcp/optimizer_tcp_manager.py", line 91, in ping
    data = self.__send_receive_data(request)
  File "/home/pixy/python-environments/env/lib/python3.6/site-packages/opengen/tcp/optimizer_tcp_manager.py", line 69, in __send_receive_data
    conn_socket = self.__obtain_socket_connection()
  File "</home/pixy/python-environments/env/lib/python3.6/site-packages/decorator.py:decorator-gen-2>", line 2, in __obtain_socket_connection
  File "/home/pixy/python-environments/env/lib/python3.6/site-packages/retry/api.py", line 74, in retry_decorator
    logger)
  File "/home/pixy/python-environments/env/lib/python3.6/site-packages/retry/api.py", line 33, in __retry_internal
    return f()
  File "/home/pixy/python-environments/env/lib/python3.6/site-packages/opengen/tcp/optimizer_tcp_manager.py", line 65, in __obtain_socket_connection
    s.connect((ip, port))
ConnectionRefusedError: [Errno 111] Connection refused

[alphaville]

I can't tell - I need to see your code or a minimum working example. You might not have started the TCP server, you might not be calling it properly, or not have set the TCP configuration right.

[alphaville]

@sinashm any updates on this one?

[sinashm]

@alphaville I try to build the optimizer again with Python3 but it seems it got stuck.

(env) pixy@pixy:~/catkin_workspaces/catkin_sina/src/nmhe$ python3 NMHE.py
INFO:root:Initialising builder
INFO:root:Checking user parameters
INFO:root:Creating necessary folders
INFO:root:Copying icasadi interface to target directory
INFO:root:Generating Cargo.toml for target optimizer
INFO:root:Generating icasadi Rust library file
INFO:root:Defining CasADi functions and generating C code
INFO:root:Defining function psi(u, xi, p) and its gradient
INFO:root:Function psi and its gradient (C code)
INFO:root:Defining function F1(u, p)
INFO:root:Mapping F1 (C code)
INFO:root:Defining function F2(u, p)
INFO:root:Mapping F2 (C code)
INFO:root:Generating casadi_memory.h
INFO:root:Generating intercafe.c (C interface)
INFO:root:Generating main code for target optimizer (lib.rs)
INFO:root:Generating build.rs for target optimizer
INFO:root:Generating YAML configuration file
INFO:root:Building optimizer

[alphaville]

It turns out that the problem is that you hadn't included with_constraints in the problem formulation, therefore the build fails. What we need to do is to have NoConstraint() as the default constraints (instead of None) so that users don't have to specify the absence of constraints.