access denied (java.io.FilePermission" "<>" "execute")

Hello,

I am using windows os and using rapidminer 8.2

I am developing an extension in which I am trying to execute a command eg:

ffmpeg -i small.mp4

  from the java code

I have tried using

1. Runtime.getRuntime().exec("cmd /c ffmpeg -i abc.mp4")
2.  I have tried using process builder for the same

 but still I am getting the same error as shown in  attachment .

I have tried similar approach in simple java class program inside void main function and both the points mentioned above are working fine.

But when I tried using above mentioned points inside rapiminer extension and  I am getting the error.

I also tried using simple commands like "dir" still similar error.

I went to this Link before posting but didn't find any solution regarding this.

can anyone please provide suggestions regarding this?