# Error Messages in Relation with LOGIN and LOGOUT Requests

Potential Error Messages

Below you will find a list of the error messages you may receive in relation with session management and LOGIN and LOGOUT..

Comments on the Table

- Error Code: Code created after message codes
- Error message: short error message that is output with the error code
- Output format: The message can be output in KV (Key/Value) and/or XML formats.
- LOGIN/LOGUT: The message occurs with LI (login) or LO (logout).
- Description: Explanation of the message

Error Code | Error Message | Output Format | LOGIN (LI) LOGOUT (LO) | Description
--- | --- | --- | --- | ---
63000040110 | Keyword "Action" cannot be recognized | KV | LI/LO | The keyword "Action" could not be recognized.
63100020005 | Too many failed logins, login is temporarily blocked | KV / XML | LI | In order to protect your access against abuse, it is blocked for a defined period after a defined number of failed login attempts.
63100040202 | Keyword "User" must appear once and just once | KV | LI | You entered the keyword "User:" several times.
63100040302 | Keyword "Password" must appear once and just once | KV | LI | You forgot to enter the keyword "Password:" or you entered it several times.
73100000005 | The maximum number of permitted login is reached | KV / XML | LI | To protect the system against excessive use (i.e. abuse), only a defined limited number of concurrent sessions is permitted. If this maximum is reached, any further attempt to set up a session (login) will be rejected.
83000000004 | Validation of XML request against Schema failed | XML | LI/LO | The syntax of the XML request is incorrect, validation against the schema fails.
83000000010 | Login failed | KV / XML | LI/LO | You entered an invalid user or password.