Reference: Error Codes

Status code	HTTP code	Meaning	Status message
0003	400	The initiator is busy.	The initiator is busy
0004	400	The initiator doesn't pick up the phone.	The initiator doesn't pick up the phone
0005	400	Unknown error establishing the conference.	unknown error establishing the conference
0006	400	The conference is closed.	The conference is closed
0007	400	The conference is finished.	The conference is finished
0008	400	The conference is deleted.	The conference is deleted
0055	403	Conference starttime for sandbox not allowed.	Conference starttime for sandbox not allowed.
0093	403	No authorization to use the service.	Required permissions are missing.
0101	403	Invalid flags for participant.	Wrong participant flags
0102	403	No participantspecified.	No participant given
0103	403	No conferencespecified.	No conference given
0104	403	No templatespecified.	No template given
0105	403	Incorrect value in field what.	Wrong what value
0106	400	Incorrect value in field action.	wrong action value
0200	403	The upper limit for durationhas been reached.	The high threshold of duration exceeded
0201	409	No participantfor conferencespecified.	No participant found in conference
0202	409	No participantfound in template.	No participant found in template
0203	409	Conference does not contain an initiator.	No initiator found in conference
0204	403	Maximum number of participants reached.	The number of participants exceeded
0205	403	Phone number not allowed.	Number not allowed
0206	409	This number cannot be modified.	The number cannot be changed
0207	403	An initiator already exists for this conference.	An initiator already exists
0208	400	Incorrect number format.	Invalid number format
0209	400	Redial and mute are only possible between an active conference.	cannot apply actions on the participant from an uncommitted or scheduled conference
0210	400	Phone number was blocked by the provider.	Number blocked by provider
0211	400	Number blocked by user.	Number blocked by user
0213	400	Planned date is invalid.	Schedule Date is invalid
0214	400	Planned time is invalid.	Schedule Time is invalid
0215	400	Planned time lies in the past.	Conference starttime is in the past.
0216	400	Invalid value for duration.	Invalid value for duration.
0217	403	Invalid value for recurring.	Invalid recurring or notification value
0218	400	The scheduling date for the conference is too far in the future.	the scheduled time exceeded: the number of days until the conference will start is higher than the limit
0219	404	conferencewas not saved. Participant status can not be requested.	Failed to get the participant's status for an uncommitted conference
0220	400	Participant is currently in the conference. A redial is not possible.	The participant still in. Redial him later.
0221	409	In a saved conference the initiator can not be changed. It cannot be deleted also.	The initiator cannot be changed for a commited conference
0221	409	In a saved conference the initiator can not be changed. It cannot be deleted also.	Intiatior cannot be deleted.
0222	400	The conference type (ad-hoc or scheduled) can not be changed.	Failed to convert a scheduled conference
0223	400	No active conference. Participant status can not be requested.	Failed to get the participant's status for a scheduled conference
0405	409	Conference room already exists.	Conference room already exists
0407	404	Conference room does not yet exist.	Conference room does not exist
0408	404	participantdoes not exist.	Participant does not exist
0409	404	Invalid name for initiator.	Invalid initiator number
0410	404	Participant already exists.	Participant already added
0411	404	Template does not exist.	Template does not exist
0412	400	ownerIdis too short (minimmum length is 3 characters).	The ownerId is too short. The minimum length is 3 characters.
0413	400	ownerIdis too long (maximum length is 39 characters).	The ownerId is too long. The maximum length is 39 characters.
0421	400	Rate of get conference status calls is limited	Polling the conference status is limited. Please retry later.
0460	400	The uploaded sound file is invalid	Bad Sound File - WAV not parsable
0461	400	The uploaded sound file has an unsupported sample rate	Bad Sample Rate - unsupported sample rate
0462	400	The uploaded sound file has an unsupported number of channels	Bad Number Of Channels - unsupported number of channels
0463	400	The uploaded sound file has an unsupported codec	Bad Codec - unsupported codec (neither 16Bit linear, signed little-endian nor a-Law nor -Law)
0464	400	The uploaded sound file is too big	Size Exceeded - uploaded data exceeds size limit
0470	400	The maxumum number of announcement sets is reached	Maximum number of announcement sets reached
0471	404	Specified announcement set not found	Announcement Set does not exist
0472	400	Type of announcement invalid	Announcement Type is invalid
0473	400	Selected language is invalid	Selected language is invalid. Allowed values are de and en.
0474	400	Caller ID to show is invalid	Selected Caller ID is invalid. Allowed values are moderator and conference.

See also Reference: Global Error Codes.