Cannot write to unmasked output

Problem description

When trying to flatten a lightcurve I have just downloaded, I get

TypeError: cannot write to unmasked output

I have tried passing the argument mask=np.zeros([len(lc.time)], dtype=bool) to see if it would do anything but the same happens.

Example

import lightkurve as lk
import matplotlib.pyplot as plt
import numpy as np

search_results = lk.search_lightcurve("HD 39091", mission="TESS", exptime="short", sector=39)

lc = search_results.download()

lc_f = lc.flatten(window_length=901))

Expected behavior

Get a flattened lightcurve.

Environment

• platform (e.g. Linux, OSX, Windows): Linux, Ubuntu 21.04
• lightkurve version (e.g. 1.0b6): 2.0.11
• installation method (e.g. pip, conda, source): pip

EDIT: Even more weird is that this issue happens only on one computer but not on a different one. I’ve tried uninstalling lightkurve and reinstalling and the same happens.

[barentsen]

Likewise, I am also able to run the CBVCorrector example posted by @astrobel above with Lightkurve v2.1.1. (This is of course consistent with @astrobel’s own findings.)

I am going to close this issue because it looks like the issues reported here have been resolved in Lightkurve v2.1.1. I do encourage anyone who encounters these errors with v2.1.1 or later to comment below or open a new issue.

As a reminder, you can upgrade Lightkurve using:

python -m pip install --upgrade lightkurve

And you can check the version number as follows:

import lightkurve
print(lightkurve.__version__)

[astrobel]

Update!! Fixed this by running an update: it works just fine with astropy-5.0.3 and lightkurve-2.1.1.