Mujoco-py: ERROR: Could not open activation key file mjkey.txt

[abhigenie92]

~/.m/m/bin » ./simulate ../model/humanoid.xml                             (ppo_latest) 20:45:08
MuJoCo Pro library version 1.50
ERROR: Could not open activation key file mjkey.txt

Press Enter to exit ...

~/.m/m/bin » pwd                                                          (ppo_latest) 20:45:14
/Users/abhishek/.mujoco/mjpro150/bin

~/.m/m/bin » ls ../../                                                    (ppo_latest) 20:45:16
__MACOSX         mjkey.txt        mjpro150         mjpro150_osx.zip

[Murukaen]

+1

[Johnzdh]

I also had this problem. I thought there must be something wrong with the README.md. I solved this problem by placing my license key at ~/.mujoco/mjpro150/bin/mjkey.txt instead of ~/.mujoco/mjkey.txt.
Hope that can help you.

[leahwu]

+1

[sudoankit]

Here's what worked for me: (note this is just to run ./simulate, for your custom files/code you'll have to follow a similar way )

1. Open simulate.cpp and search for mj_activate( ) function. ( line number 1217 ).
2. Pass the full path of your mjkey.txt. For me it was, mj_activate("/Users/sudoankit/.mujoco/mjpro150/sample/mjkey.txt");
3. Once done, make in the same directory.
4. Now try running ./simulate, which is in your mujoco/bin directory.
5. A GUI window should open, drag any model from the model directory to the window.

[emmazfj]

~/.m/m/bin » ./simulate ../model/humanoid.xml                             (ppo_latest) 20:45:08
MuJoCo Pro library version 1.50
ERROR: Could not open activation key file mjkey.txt

Press Enter to exit ...

~/.m/m/bin » pwd                                                          (ppo_latest) 20:45:14
/Users/abhishek/.mujoco/mjpro150/bin

~/.m/m/bin » ls ../../                                                    (ppo_latest) 20:45:16
__MACOSX         mjkey.txt        mjpro150         mjpro150_osx.zip

problem solved