dump annotation error - constructing empty shapely linestring

[nmaxwell]

I'm getting this error when I try to dump my annotations:

Can not dump annotations for the task. Code: 500. Message: "cvat.apps.engine.utils.InterpreterError: ValueError at line 90: LineStrings must have at least 2 coordinate tuples\n"

strange thing is my annotations only have points, no polylines, so not sure why linestrings are being made. I'm a bit worried that I won't be able to export my work, that it will be lost.

attaching the docker log
cvat-log.txt

thanks!

[zhiltsov-max]

Hello. Could you please describe what annotations does the task have and what is your version of CVAT? It looks like there are some interpolation mode shapes (tracks), which can only be bounding boxes, if you used UI to annotate images. Is is possible that you've imported annotations?

[nmaxwell]

Hi,

Thanks for the response. I've been using 'Create Shape' to add 'Points' annotations, and then using 'Merge Shapes' to merge them into one track, across multiple frames, and setting a single attribute for the track.

I think there were instances where I implicitly interpolated, since I merged shapes across images that didn't have any shapes. Eg. add shape to image 50, add shape to image 55, merge them; this then auto-adds shapes to images 51, 52, 53, 54, which I then adjust. Maybe that counts as interpolation?

Now as for the version, I pulled develop originally on 3/19/2020, which is the version that gave the above error.

Last night, I pulled develop again, and did a 'docker-compose build'. I now get a different error:

Can not dump annotations for the task. Code: 500. Message: "FileNotFoundError: [Errno 2] No such file or directory: '/home/django/cvat/apps/annotation/cvat.py'\n"

with this log:
cvat-log.txt

thanks again

[zhiltsov-max]

I suppose there can be some frames, where there is only 1 point then? Since this looks like the cause of the initial problem with interpolation.

If you want to stick to the current develop you probably need to do some migrations (@azhavoro), but be noted that this branch may be unstable a bit at present. You probably need to launch migrations for annotation app.

[zhiltsov-max]

This bug should be fixed by #1344, so closing the issue. Feel free to reopen, if this still a problem.