Show Metrics Plot - Unresponsive

[NathanDoyleB612]

Hi all,

So I'm using this beautiful software to segment Eucalyptus roots. I've annotated quite a lot (972 images to be exact). However, when I try to access the metrics plot I get the following error:

"log_exception 2026-03-20 10:57:13.757265|sys_exception|Error. type: <class 'IndexError'>, value: list index out of range, traceback: File "plot_seg_metrics.py", line 197, in run
File "plot_seg_metrics.py", line 104, in load_annot_events
File "interaction_time.py", line 74, in events_from_client_log"

Any advice? I'd really like to be able to see the metrics plot and report on it

thanks!

[Abe404]

in your project folder, there is a file called 'metrics_cache.pkl' try to rename this as 'backup_metrics_cache.pkl' which should trigger the corrective metrics plot to rebuild this cache.

I'm not sure exactly what the problem is yet, but wondering if the cache might be corrupt somehow.

[NathanDoyleB612]

I changed the file name. Opened windows powershell ran "start-trainer". Opened root painter and tried to show the metrics plot but encountered the same issue.

[Abe404]

Looking at the traceback more closely, I think there could be an issue with a corrupted client annotation log. The metrics plot parses <your_project_folder>/logs/client.csv, and a malformed line in that file would cause exactly this crash.

Could you take a look?

1. First, back up the file by copying <your_project_folder>/logs/client.csv somewhere safe.
2. Then open it in a text editor and look for:
   • Empty lines
   • Lines missing the fname: part
   • Lines with fewer than three comma-separated values

Normal lines should look something like:

2026-03-20 10:55:00.123,1742295300.123,mouse_press,fname:image001.png,x:100,y:200,...

If you spot anything unusual, could you paste those lines here?

[NathanDoyleB612]

I appreciate the swift reponses!

• There are no completely empty lines
• No lines are missing the fname: prefex in the 4th column
• No lines have fewer than 3 comma seperated values
• columns 5 through 9 are empty only when "update_file_end" and "save_annotation" are stated in column 3 (see attached)

would you like me to send the full client.csv file?

[Abe404]

if you can - maybe there's an extra empty line somewhere.

[NathanDoyleB612]

client.csv

[NathanDoyleB612]

I found one! Line 84142

[Abe404]

I downloaded your CSV. Line 84142 is a truncated update_file_end event. Replace it with:

2026-03-10 12:12:38.943347,1773137558.943347,update_file_end,fname:34_GC_R_B180_2025-09-03_10-58-09.jpg

That should fix the metrics plot.

[NathanDoyleB612]

Thank you very much! All is fine now

[Abe404]

Thank you also for your quick responses. I’m glad we were able to get this sorted so quickly. I’m not sure what caused the file to get corrupted in this way, and as it’s a one off I’d rather wait until I see the issue a few times before building a more automatic solution.

kind regards,
Abraham