sed error on expect script

I am trying to use a simple sed command inside with a expect script

spawn sed -n '/0032ff00/,/clogoff/p' /tmp/file.tmp > /tmp/file.tmp1

I get an error:

sed: -e expression #1, char 1: unknown command: `''

I also tried with replacing the '' with {}

spawn sed -n {/0032ff00/,/clogoff/p} /tmp/file.tmp > /tmp/file.tmp1

Then I get:

sed: can't read >: No such file or directorysed: can't read /tmp/file.tmp1: No such file or directory