Problems with connecting to the ROS master using rosinit

I am running ros on a raspberry pi 4 and used the following code to try to establish a global ROS node

    setenv('ROS_MASTER_URI','http://192.168.1.2:11311')
    setenv('ROS_IP','192.168.1.1') 
    rosinit('192.168.1.2')

and the error message that pops up on rosinit is

'   Connection to process with Exchange: "ce85a6ab-8a96-40e9-9f51-c8fa6ac4ded8 " was lost.

It never happened before as I was able to establish the connect previously, and neither using rosshutdown or rebooting the raspberry pi worked

[Abhijeet Gadkari]

Hello Linn,

Can you provide some more details of your setup?

1. MATLAB release version (along with update version if any)
2. ROS version installed on your Raspberry Pi (kinetic, melodic, noetic?)

-Abhijeet

[Cam Salzberger]

3) Does it behave differently if you don't set the environment variables and just try rosinit with the IP address argument?

4) What about if you don't use rosinit and just try:

ros.Node('/test_node', '192.168.1.2')

5) Does it work if you start the ROS Master on MATLAB (rosinit, no arguments, no environment setting), and then connect to it from the Raspberry Pi?

-Cam