Why do I encounter an error "no chunk size found while parsing data from server answer" when downloading results from Polyspace Access?

I am downloading some analysis results from Polyspace Access R2022b, but am encountering the following error:

Connecting to https://mydomain.com:443
Connecting as a.user
Downloading results for RunId 1
Download preparing for DOWNLOAD_ID r1rw 
Download preparation complete for DOWNLOAD_ID: r1rw Error: Error: no chunk size found while parsing data from server answer 
Try 'polyspace-access -h' for more information

In the Docker container logs, I discovered this error:

ERROR 14 --ExceptionWebSocketHandlerDecorator (see line 2233 in access-web-sever.log)

Why does this error occur?

Answer 1

[MathWorks Support Team]

This error is due to having multiple Polyspace versions installed on the computer. In the PATH environment variable, you should observe that there are multiple Polyspace installation folders, e.g.

...
C:\Program Files\Polyspace\R2021b\polyspace\bin
...
C:\Program Files\Polyspace\R2022b\polyspace\bin
...

To fix the issue, please ensure that the path corresponding to the Polyspace version you intend to use with Polyspace Access is on top of other paths. In this case, move "C:\Program Files\Polyspace\R2022b\polyspace\bin" above "C:\Program Files\Polyspace\R2021b\polyspace\bin".