'NoneType' object is not subscriptable in `detect_flicker.py`

[paulmueller]

Data ID: hdf:p=0.2675^i=0
Traceback (most recent call last):
File "run-chipstream-cli.py", line 8, in
File "click\core.py", line 1161, in call
File "click\core.py", line 1082, in main
File "click\core.py", line 1443, in invoke
File "click\core.py", line 788, in invoke
File "chipstream\cli\cli_main.py", line 223, in chipstream_cli
File "chipstream\cli\cli_proc.py", line 61, in process_dataset
File "dcnum\read\detect_flicker.py", line 40, in detect_flickering
TypeError: 'NoneType' object is not subscriptable
[PYI-1792:ERROR] Failed to execute script 'run-chipstream-cli' due to unhandled exception!

[paulmueller]

It seems like dcnum does not find images in the data file. After identifying the problem with the file, there should be a more descriptive error message at least.

[paulmueller]

The file indeed does not contain any image data.

[paulmueller]

54dbdc2