All instances are killed when running parallel and one get error

Hi everyone,
I’m running appium multi instances following:

*start appium servers:
appium -U address1 -p port1 --device-name instance1 ‘–suppress-adb-kill-server’;
appium -U address2 -p port2 --device-name instance2 ‘–suppress-adb-kill-server’;
appium -U address3 -p port3 --device-name instance3 ‘–suppress-adb-kill-server’;

Sometime one instance get error all other instances are killed. Is there any way to prevent killing other instances and make each instance become independent?
I’m using appium version 1.4.1; client: wd

Thank you