OpenSSL bitcoin addresses generation

Using OpenSSL ver 1.1.0h on win 8.1 – 32 bit

Im trying to recreate this post using cmd: OpenSSL generate Bitcoin address

But on step 3:

openssl ec -in c:keysprivate.pem -outform DER|tail -c +8|head -c 32|xxd -p -c 32 > c:keysprivate.key

I got this error: ec: Unknown cipher c

Any idea what im doing going wrong?