I am getting errors trying to train an RL DDPG Agent

Error using rl.internal.train.OffPolicyTrainer/run_internal_/nestedRunEpisode (line 284)

An error occurred while running the simulation for model 'RLmxolisifinal' with the following RL agent blocks:

RLmxolisifinal/RL Agent

Error in rl.internal.train.OffPolicyTrainer/run_internal_ (line 351)

out = nestedRunEpisode(policy);

Error in rl.internal.train.OffPolicyTrainer/run_ (line 40)

result = run_internal_(this);

Error in rl.internal.train.Trainer/run (line 8)

result = run_(this);

Error in rl.internal.trainmgr.OnlineTrainingManager/run_ (line 112)

trainResult = run(trainer);

Error in rl.internal.trainmgr.TrainingManager/run (line 4)

result = run_(this);

Error in rl.agent.AbstractAgent/train (line 86)

trainingResult = run(tm);

Caused by:

Error using rl.env.internal.reportSimulinkSimError (line 29)

Unable to find system or file 'rRLmxolisifinal'.

[Alan]

Hi Mxolisi,

Could you provide some details of your setup? Preferably your simulink model and the training script if you are using one.

Answer 1

[Shantanu Dixit]

Hi Mxolisi, it seems that the system or file 'rRLmxolisifinal' cannot be found. Following could be the possible steps to troubleshoot the issue.

• Check the model name is correctly specified as 'rRLmxolisifinal', since the model names are case-sensitive.
• Verify that the model file is in the current working directory. To locate the path use 'which' command, you can add the file to the current working directory using 'addpath'.
• Ensure the model exists, is not corrupted and can be compiled.

Refer to the below MathWorks documentation for locating and adding file to the current directory:

• addpath: www.mathworks.com/help/matlab/ref/addpath.html
• which: https://www.mathworks.com/help/matlab/ref/which.html