I have balance in escrow account but when i transfer funds from escrow to another account transaction show your balance is low in testnet

Are you attempting to send 0.002 Algo to that address? If it currently doesn’t have a balance then that’s why. If not, please provide more details about what you’re doing.

Minimum balance for algorand account is 0.1 algo. Only for new account you can have 0 balance.

So , if you want transfer 0,002 , you must use --close-to flag.