Thermal conductivity of Ar

hello.
    This is the of code thermal conductivity of Ar.
    I want to integration.I put s=1,p=1000 and d=1000 but the
    values of fix command in ar file is negative but it must be
    positive.(see the files that I send)
    please help me.
    Thank you.

code and result.rar (20.3 KB)

Sorry - you'll have to ask a more specific
question than "my simulation didn't work - help
me".

Steve