BG95-M3 problem with certification

Hi guys,
I am trying to send a POST request over HTTPS.
So I tried to go through the example from the document
“Quectel_BG95BG77BG600L_Series_HTTPS_Application_Note_V1.1-1.pdf”
Chapter “3.2.2.1. HTTPS POST Body Obtained from UART/USB”.
The BG95 was connected via UART to the PC and I sent the commands using the QCOM v1.6 app.

Everything works until I try sending a command:
AT+QFUPL=“cacert.pem”
After that command I get:
“CONNECT

So I choose in QCOM app file and send it.
After sending file I got error “CME ERROR: 421”.

When I tried to list files:
AT+QFLST=“*”
I found that the file has been created but I am confused by this error.

Maybe I am missing something?
Thank you!

Hi @Hepek93

CME: 421 means the file upload timeout. so please check the file length if matched with the command which you set.