[racket] DrRacket 6.0.1 with R5RS user-initial-environment

[Tim]

Hi, I am using DrRacket 6.0.1 with language R5RS when I try to evaluate the
statement:
(eval '(+ 1 2) user-initial-environment)
I get the error:
"user-initial-environment: undefined;"

 Am I doing something wrong? Thank you.

-Tim O.

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