Blue Iris: Help with ALPR error message after upgrade.

Feb 17, 2026
2
0
Bangkok
Hello there,
We had the ALPR with YOLO v5 working on our old system.
It is not working on our upgraded system.
We are a virtualized environment.

Here is an example error message:


03:03:51:Response rec'd from License Plate Reader command 'alpr' (...b2572a) ['No plates found'] took 300ms


I've uploaded a picture of what the clip looks like from Blue Iris.
Object detection is working
It can tell if a plate is day or night
It does not record or catalog any plate.

Based from the picture I uploaded, do you think:

The image quality is not good enough?

The cars are moving too quickly?

Something else?

The dashboard is getting plenty of hits for the ALPR but all get the above error message.Screenshot 2026-02-17 181128.png
 
Thiis is version 5
Here are the alerts for AI
It reads custom models like day plate and night plate no problem.

another example error:


03:47:49:Response rec'd from License Plate Reader command 'alpr' (...dc0b18) ['No plates found'] took 147ms
 

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