当一个实例运行外部程序时，R的多个实例的稳定性如何？

I am running an external program via R that is pretty memory hungry and can take >8 hours to run. I'd like to open up another instance of R to do other tasks but am concerned about crashing the external program and having to restart the process. Should I expect any problems under these circumstances? The external program is widows only and I'm running it on a Bootcamp partition on a MacBook Pro.I am running an external program via R that is