First, I want to say merry xmas to everyone. Hope everyone has a good vocation.
I want to start the spss server get to work through the javaplugin.jar supplied by IBM spss supply . During the working , I find the syntax sentence "SET PRINTBACK ON MPRINT ON." can print the result into console. But now, I want to close the function that means I don't need the messages printed in the console which only wastes time and occupies the memories. I tried to use the syntax sentence "SET PRINTBACK OFF MPRINT OFF.". I also tried replace the "OFF" by "NO" or "NONE". But it didn't work.
I wonder if anyone has met this problem before? Any feedback is prefered. Thanks in advance. Below is my simple program. I also upload the console screenshots.