Illegal fix ave/chunk command

LAMMPS LAMMPS Beginners
1

There is a trouble about Illegal that plague me all the day.

I think the parameters about Nevery Nrepeat Nfreq are set correctly.But when I run this project just 2 steps will get this error.
Have anybody can help me please！ ！！ :smiling_face_with_tear:
There is my input file and log file as below：

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2

Hi,
What is that “screen no” option that you are using? I don’t see it in the doc.
Simon

3

Blockquote

Thank you very much for the reminder, after the modification my problem is solved. :smiling_face_with_three_hearts:
After a day of coding, my brain is a little confused，lol :rofl: