> For the complete documentation index, see [llms.txt](https://docs.medialooks.com/video-transport/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.medialooks.com/video-transport/vt-api/errors-reference.md).

# Errors reference

### (-2147023436) eVTR\_E\_SGN\_Timeout

Connection timeout.

### (-974) eVTR\_E\_NotConnected,(-969) eVTR\_E\_WrongState

Attempt to interact with signaling in case of no signaling connection.

### (-980) eVTR\_E\_MissedPayload

`Payload` message is not correct.  

### (-196) eVTR\_E\_Auth\_Sign\_Wrong

Reseller license is not valid.

### (-975) eVTR\_E\_NotFound

`"Sign"` field has not been found.

### (-198) eVTR\_E\_Auth\_NotAuthorized

Cannot find any valid license.

### (-190) eVTR\_E\_Auth\_License\_Expired

License has expired (current date=`exp_date`)

### (-191) eVTR\_E\_Auth\_License\_InvalidDate

 Not valid date format of `exp_date` field.

### (-175) eVTR\_E\_Auth\_Server\_Missed 

The field `"Auth_url"` is missing and there is no address on which we need to listen to incoming connections.

### (-195) eVTR\_E\_Auth\_Credentials\_Missed 

`"Username"` field not found.

### (-188) eVTR\_E\_Auth\_License\_MissedKey

The license file does not contain any public or private keys.

### (-193) eVTR\_E\_Auth\_Credentials\_Wrong

Password is not valid

###  (-1000) eVTR\_E\_Unexpected

Any problem with key signs.

### (-192) eVTR\_E\_Auth\_License\_MissedId

 Missing `"id"` field

### (-178) eVTR\_E\_Auth\_Username\_Missed

Missing `"Username"` field.

### (-177) eVTR\_E\_Auth\_Username\_NotFound

`"Username"` field not found

### (-180) eVTR\_E\_Auth\_ClientID\_Missed

`"ClientID"` field is missing.

### (-179) eVTR\_E\_Auth\_ClientID\_NotFound

`"ClientID"` field is missing.

### (-199) eVTR\_E\_Auth\_Corrupted

Can't read the public key.

### (-950) eVTR\_E\_Exception

Fatal error. 

### (-997) eVTR\_E\_InvalidArgument

Any incorrect properties detected.