PDU mass configuration with Ini Utility issues

[Lerva1922]

I'm using following PDU models in our Data Center:  AP8886X856

- Rack PDU Version 7.0.8

- APC OS (AOS) Version 7.0.8

Everything is working perfectly through Graphical User Interface(GUI). ini files can be downloaded/uploaded with GUI without any issues.

I want to mass deploy dozens of PDU with ini Utility but cannot get it to work. Changing login credentials should be doable for all of them with mass deployment feature??

I tested my connection with direct Ethernet cable from my laptop into the Management port without any luck. While trying to download config.ini the task stops with following error message:

"Checking for INI support Error, INI files not supported

** Summary **

There was 1 failure logged this session.
XX.XX.XX.XX: Does not support INI files."

At the same time GUI download works fine.

What protocols are required to be enabled? My FTP on  the PDU side is enabled.

Running out of ideas. Nothing works with the INI Utility.