html_url,issue_url,id,node_id,user,created_at,updated_at,author_association,body,reactions,performed_via_github_app,issue
https://github.com/pydata/xarray/issues/7814#issuecomment-1536900927,https://api.github.com/repos/pydata/xarray/issues/7814,1536900927,IC_kwDOAMm_X85bmz8_,25112215,2023-05-05T23:27:17Z,2023-05-05T23:28:08Z,NONE,"Thanks Kai,
I have attached the output of `xr.show_versions()` and of `pip list`.

> Does this happen only with these special files, or do you experience this every time?

I tried with two netcdf files from https://www.northwestknowledge.net/metdata/data/ and got the same _TypeError: 'NoneType' object is not callable_

> Does the problem persists when specifying engine=""netcdf4"" or engine=""h5netcdf"" in the call to open_mfdataset?

Only engine=""netcdf4"" works as a parameter but I get the same error, h5netcdf is not recognized as an engine.

> Does this also happen, if you open the files one-by-one (with xr.open_dataset) and combine the Datasets with xr.concat?

Yes, opening files with xr.open_dataset and combining them with xr.concat gives the same error.

Please note the following that I just realized, the resulting combined netCDF file is actually created even though the errors are displayed.
Also, as I mentioned in my first message, if I run the commands line by line in the python console no error message is displayed, this happens only when the code is ran as a script.

Paul

[pip_list.txt](https://github.com/pydata/xarray/files/11410616/pip_list.txt)
[xr.show_versions.txt](https://github.com/pydata/xarray/files/11410617/xr.show_versions.txt)
","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,1695028906
https://github.com/pydata/xarray/issues/7814#issuecomment-1535168128,https://api.github.com/repos/pydata/xarray/issues/7814,1535168128,IC_kwDOAMm_X85bgM6A,25112215,2023-05-04T17:44:14Z,2023-05-04T17:44:31Z,NONE,"Deepak, thanks for replying, I have attached a couple of my netCDF files. Hopefully these will help for reproducing the issue.

[Archive.zip](https://github.com/pydata/xarray/files/11400070/Archive.zip)
","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,1695028906
https://github.com/pydata/xarray/issues/7814#issuecomment-1533918236,https://api.github.com/repos/pydata/xarray/issues/7814,1533918236,IC_kwDOAMm_X85bbbwc,30606887,2023-05-04T00:41:32Z,2023-05-04T00:41:32Z,NONE,"Thanks for opening your first issue here at xarray! Be sure to follow the issue template!
If you have an idea for a solution, we would really welcome a Pull Request with proposed changes.
See the [Contributing Guide](https://docs.xarray.dev/en/latest/contributing.html) for more.
It may take us a while to respond here, but we really value your contribution. Contributors like you help make xarray better.
Thank you!
","{""total_count"": 0, ""+1"": 0, ""-1"": 0, ""laugh"": 0, ""hooray"": 0, ""confused"": 0, ""heart"": 0, ""rocket"": 0, ""eyes"": 0}",,1695028906