[knot-dns-users] kdig / knsupdate: "; ; ERROR: failed to parse keyfile '...' ; ; DEBUG: srv_info_free: null parameter"

tl;dr: I've searched the Internets a lot these past days, but weren't able to find a way to make kdig and knsupdate work with keys. How is this handled? Hello knot people, I've got a problem with kdig and knsupdate, specifically using the -k parameter. I'm using: - Debian 8.5 - dnssec-tools 2.2-2 (out of stretch) - knot-dnsutils 2.2.0-2~bpo80+1 (out of j-bp) - dnsutils 1:9.9.5.dfsg-9+deb8u6 (out of jessie) I'm creating the key with: # dnssec-keygen -a HMAC-MD5 -b 256 -n HOST -C host.example.com which gives: # cat Khost.example.com.+157+11483.* host.example.com. IN KEY 512 3 157 42eRdcSUtT2opnOPVaGY9nEPsryde7snDaKLOPSjI9I= Private-key-format: v1.2 Algorithm: 157 (HMAC_MD5) Key: 42eRdcSUtT2opnOPVaGY9nEPsryde7snDaKLOPSjI9I= Bits: AAA= Doing then: # knsupdate -d -k Khost.example.com.+157+11483. which gives: ;; ERROR: failed to parse keyfile 'Khost.example.com.+157+11483.' ;; DEBUG: srv_info_free: null parameter I've found [1], and indeed, I'm running into the mentioned error if using knot-dnsutils 1.6.0-1 out of jessie. Besides this, I wasn't able to find anything useful. But, doing this: # knsupdate -y hmac-md5:host.example.com:42eRdcSUtT2opnOPVaGY9nEPsryde7snDaKLOPSjI9I= works, the same as nsupdate does: # nsupdate -k Khost.example.com.+157+11483. Could someone shed some light on what I'm doing wrong? Any help appreciated... Thanks in advance and for your work on knot! All the best, Georg [1] https://lists.nic.cz/pipermail/knot-dns-users/2015-February/000579.html