Can't create an RR with DNS::rr

I am trying to create an SOA record with DNS::rr but can't figure out how to do so without getting a an error that says - Failed rdata parse invoked from within "DNS::rr "0.c.7.4.0.0.a.2.ip6.arpa" SOA IN 3600 "dns01.test.net 1483588369 3600 600 864000 3600""

 

The iRule has this: set new_rr [DNS::rr "0.c.7.4.0.0.a.2.ip6.arpa" SOA IN 3600 "dns01.test.net 1483588369 3600 600 864000 3600"]

 

Any ideas as to why I get this TCL Error?

 

Thanks!