HP port numbering is a mystery

I'm trying to simply assign some untagged vlans to a couple of ports on a switch here, but I'm having nothing but problems. Just updated the firmware.

HP J9576A 3800-48G-4SFP+ Switch Software revision KA.16.03.0007 

It's two stacked switches. Here's the command and response I get:

DNS-CORE-STACK# conf DNS-CORE-STACK(config)# vlan 200 untagged 1/37 Module not present for port or invalid port: 1/37 

And here's a bit of show config that makes me think that the port syntax I'm using is right:

vlan 200 name "VLAN200" untagged 1/1-1/6,1/27,1/29 tagged 1/22,1/24,1/26,1/28 ip address 10.10.20.254 255.255.255.0 exit 

I'm pretty dumb at networking. I'm actually trying to assign two ports that are set on dynamic LACP. Could that be it?

DNS-CORE-STACK(config)# show lacp LACP LACP Trunk Port LACP Admin Oper Port Enabled Group Status Partner Status Key Key ----- ------- ------- ------- ------- ------- ------ ------ 1/37 Active Dyn1 Up Yes Success 0 0 2/37 Active Dyn1 Up Yes Success 0 0 DNS-CORE-STACK(config)# vlan 200 untagged Dyn1 Dyn1: Inconsistent value. 

Any assistance would be most appreciated.