Can't visualise the Example

❓ Questions and Help

I am trying to run the example from habitat-api’s quick start guide but when I run it, it doesn’t open the viewer.

I create the file testActions.py and I am calling it from outside both habitat-api and habitat-sim repository. I tried bot python testActions.py and python testActions.py ./habitat-sim/build/viewer --enable-physics /data/scene_datasets/habitat-test-scenes/van-gogh-room.glb

this is what it returns:

2020-03-11 15:43:12,344 Initializing dataset PointNav-v1
2020-03-11 15:43:12,562 initializing sim Sim-v0
WARNING: Logging before InitGoogleLogging() is written to STDERR
I0311 15:43:12.599169 233229760 SceneGraph.h:92] Created DrawableGroup: 
Renderer: Intel(R) Iris(TM) Plus Graphics 640 by Intel Inc.
OpenGL version: 4.1 INTEL-14.4.23
Using optional features:
    GL_ARB_ES2_compatibility
    GL_ARB_separate_shader_objects
    GL_ARB_texture_filter_anisotropic
    GL_ARB_texture_storage
    GL_ARB_vertex_array_object
    GL_EXT_debug_label
    GL_EXT_debug_marker
Using driver workarounds:
    no-layout-qualifiers-on-old-glsl
I0311 15:43:12.769114 233229760 ResourceManager.cpp:1072] Importing Basis files as BC3
W0311 15:43:14.076529 233229760 Simulator.cpp:140] :
---
 The active scene does not contain semantic annotations. 
---
I0311 15:43:14.099301 6910 simulator.py:142] Loaded navmesh data/scene_datasets/habitat-test-scenes/skokloster-castle.navmesh
2020-03-11 15:43:14,156 Initializing task Nav-v0
Environment creation successful
Traceback (most recent call last):
  File "testActions.py", line 65, in <module>
    example()
  File "testActions.py", line 24, in example
    observations["pointgoal"][0], observations["pointgoal"][1]))
KeyError: 'pointgoal'
I0311 15:43:14.704975 233229760 Simulator.cpp:35] Deconstructing Simulator
I0311 15:43:14.705004 233229760 SemanticScene.h:40] Deconstructing SemanticScene
I0311 15:43:14.705010 233229760 SceneManager.h:24] Deconstructing SceneManager
I0311 15:43:14.705014 233229760 SceneGraph.h:25] Deconstructing SceneGraph
I0311 15:43:14.705575 233229760 RenderTarget.h:51] Deconstructing RenderTarget
I0311 15:43:14.705756 233229760 Sensor.h:80] Deconstructing Sensor
I0311 15:43:14.715387 233229760 Renderer.cpp:33] Deconstructing Renderer
I0311 15:43:14.715456 233229760 WindowlessContext.h:16] Deconstructing WindowlessContext
I0311 15:43:14.715466 233229760 WindowlessContext.cpp:264] Deconstructing GL context

[dhruvbatra]

@abhiskk

[c4chale]

There is a problem with the updated version of opencv-python. I find the solution by installing the version 4.1.0.25:

pip unistall opencv-python
pip install opencv-python==4.1.0.25