Cli Wallet Transfer Issue

[xeroc]

"invalid state" is a problem of the cli wallet .. make sure to not have multiple cli wallets running on the same port and restart your cli wallet
I noticed that error as well but IIRC it has always been my fault running multiple cli wallets for different chains on the same port

[sharique-knysys]

I am using graphenelib to connect to cli wallet and perform operations programatically. I call transfer method of cli wallet and it works perfectly but  I get exceptions after some calls to cli wallet. Python code gives me this exception websocket send failed: invalid state which is probably a problem of cli wallet. Can anyone tell why I get this error from cli wallet?