you may not have access to all commands
This link (https://github.com/mcMMO-Dev/mcMMO/wiki/Player-commands) may be more usefull
Party CommandsEdit
Command Effects
/party create <name Creates a party with name <name>.
/party disband Kicks out all members and deletes the party.
/ptp toggle
Toggle party teleportation.
/ptp accept Accepts party teleportation request.
/ptp acceptall Accepts all pending party teleporation requests.
/party itemshare <NONE / EQUAL / RANDOM> Choose party item share mode.
/party itemshare <loot / mining / herbalism / woodcutting> <true / false> Control items that are shared.
/party Shows who is in party.
/party <playername> Joins the player's party
/party q Leaves the current party.
/party ? View party commands.
/p OR /pc Toggles party chat.
/party invite <playername> Invites the named player to the current party.
/party accept Accepts a received party invitation.
/party lock Locks the party you are in. Only works for party leader.
/party password <password> Applies a password to your party. Only works for party leader.
/ptp <playername> Teleports to party members.
Admin CommandsEdit
All of the following commands require admin privileges.
Command Effects
/mcgod Toggles god mode on/off. (Requires Permissions)
/mmoedit <playername> <skill> <value> Sets the value of the named skill of the target player. (Requires Permissions)
/addxp <playername> <skill> <value> Adds the provided value in XP to the named skill of the target player. (Requires Permissions)
/addlevels <playername> <skill> <value> Adds the provided value in Levels to the named skill of the target player. (Requires Permissions)
/skillreset [playername] <skill> Resets named skill of target player to 0.
/inspect <playername> Inspects the target player's McMMO stats. Target player does not have to be online. (Requires Permissions)
/moblist Views a list of monsters you can spawn. (Requires Permissions)
/hardcore Toggle Hardcore mode.
/vampirism Toggle Vampirism mode. 0.0
/mcnotify Toggle ability notifications on/off.
/mcremove <playername> Remove target user from MySQL or FlatFile.
/mcpurge Purges all users from MySQL or FlatFile.
/a OR /ac
Toggles Admin Chat (Not working)
/xplock <skillname> Lock the xp bar to named skill.
/mcrefresh [player] Refreshes all cooldowns for McMMO or optionally named player.