# Revision history [back]

export the following shell variables (e.g. in your ~/.bashrc):

1. export GAZEBO_MODEL_PATH=path/to/models
2. export GAZEBO_RESOURCE_PATH=path/to/worlds.

Also make sure that all the .sdf files in the model path are inside their corresponding folders and have a model.config file beside them. If the latter is not there the model is not going to be found by gazebo. e.g.

MODELS_DIRECTORY/
|
|-->pioneer_3at/
|
|--> model.sdf
|--> model.config