Summary:
This article will help you with troubleshooting an issue with downgrading the software version on PTP 450 product line radios from software version 20.x to 16.x via CNUT.
Product:
All PTP 450 product line radios only.
Symptoms:
Error that will appear in CNUT: “Message: Invalid File Image”
Solution:
In release 20.x onward, there is a flag called, BHS Tx Power Control, if it is enabled, radio cannot be downgraded to lower loads.
Therefore we must disable this flag under the Slave → Configuration → Radio → BHS Tx Power Control → Disabled as shown in the screenshot below:
After disabling this option, try downgrading the software version to 16.x version.
Note: This is only applicable to PTP 450 radios.