"Debugging and troubleshooting", "List of MyChat Client errors", "Error #0323".
 
Error

Error #0323: non-existent custom menu index specified ID (XXX)
 

Error description

Failed to "bind" a user group to the MyChat Client custom menu because the specified menu index is incorrect or non-existent.
 
Problem solution

An error may occur if you use a third-party client to work with MyChat Server or make your own implementation of MyChat open protocol. You should check if you specified the user custom menu index correctly in the cs_adm_add_group_to_custom_menu command.