The following is the official information clew of various error code meaning, facilitate everybody looking for the corresponding solution (total 125) :

Tip: use CTRL + F quickly to search

ERROR_12: the battle.net account have not obtained the diablo III "licensing authority. (for example in a game service, when Asian server early after the opening for us account is still unable to take on the, must wait until the opening time for us, just can log in, or it will tip this mistake.)
ERROR_315300: your account name or password is not correct. Please try again. (general error occurred in when the server busy, directly in the landing interface code is used to reproduce the fast input, when in fact you copy the content is * * * * * *, not the actual code in the game, so please copy password, then quickly paste to try to land.)
ERROR_33: battle.net maintenance. Please try again later. (common mistake, maintain the rear can log)
ERROR_35: battle.net service is temporarily unavailable. Please try again later. (provisional maintenance or other state)
ERROR_37: server busy at present. Please try again later. (the most common mistake, meet after use copy password, and try to general can be successful landing.)
ERROR_3003: unable to connect service (ERROR_3003)
ERROR_316000: the name has been using other heroes. (ERROR_316000)
ERROR_316001: the name is not able to use. (ERROR_316001)
ERROR_316002: the name is restricted or inappropriate contains text. (ERROR_316002)
ERROR_300001: connection has been disconnected. Please reconnect. (ERROR_300001)
ERROR_300002: service happen a mistake, please try again. (ERROR_300002)
ERROR_300003: you won't perform the action. (ERROR_300003)
ERROR_300004: this function has not yet realized. (ERROR_300004)
ERROR_300005: this operation is in progress. Please try again later. (ERROR_300005)
ERROR_300006: request is invalid. Please try again. (ERROR_300006)
ERROR_300007: request is invalid. Please try again. (ERROR_300007)
ERROR_300008: request already timeout, please try again. (ERROR_300008)
ERROR_316003: create hero failure. Please try again. (ERROR_316003)
ERROR_315000: service happen a mistake, please try again. (ERROR_315000)
ERROR_315001: service happen a mistake, please try again. (ERROR_315001)
ERROR_316500: can't create games, please try again. (ERROR_316500)
ERROR_316501: can't create games, please try again. (ERROR_316501)
ERROR_316502: can't create games, please try again. (ERROR_316502)
ERROR_316503: can't create games, please try again. (ERROR_316503)
ERROR_316504: only the captain to perform the action. (ERROR_316504)
ERROR_316600: service happen a mistake, please try again later. (ERROR_316600)
ERROR_316601: can't join the game, please try again. (ERROR_316601)
ERROR_316602: your choice of hero does not exist. (ERROR_316602)
ERROR_316603: you attempt to join the game has not used. (ERROR_316603)
ERROR_316604: you attempt to join the game already full. (ERROR_316604)
ERROR_316605: you are not permission to join the game. (ERROR_316605)
ERROR_316606: have a activities of the game invited, please try again. (ERROR_316606)
ERROR_316607: can't join the game, please try again. (ERROR_316607)
ERROR_316700: because of your team state problem, you cannot carry out the team moves. Please try again. (ERROR_316700)
ERROR_316701: only the captain to execute the action. (ERROR_316701)
ERROR_316702: your team operation happened a mistake, please try again. (ERROR_316702)
ERROR_316800: ERROR_CHAT_INVITE_TO_WHISPER_ALREADY_IN_PROGRESS
ERROR_316801: the chat failure, please try again. (ERROR_316801)
ERROR_395000: read your account Numbers game happened when a mistake, please try again. (ERROR_395000)
ERROR_395001: read your account Numbers game happened when a mistake, please try again. (ERROR_395001)
ERROR_315002: service happen a mistake, please try again. (ERROR_315002)
ERROR_316004: you try to delete the hero is not present