Cortex API
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Warning Objects
In addition to method responses and data samples, Cortex can send a third type of message, called warnings.
These warnings inform your application about important events, like when the user logs in or out, or when a training profile is loaded or unloaded for a headset.

A warning object contain these fields:
Name
Type
Description
jsonrpc
string
Always has the value "2.0".
warning
object
An object with the fields "code" and "message".
The warning object has 2 fields:
Name
Type
Description
code
number
The code of this warning. The possible codes are documented below.
message
any
The type and value of this field depends on the code. For most of the warnings it is just a string, but it can also be an object. See the examples below.

The possible codes are:
Code
Description
0
All the data streams you subscribed to have been automatically canceled by Cortex. This can happen if the headset was disconnected.
1
Your session was automatically closed by Cortex. This can happen if the headset was disconnected.
2
The user has logged in with EMOTIV App.
3
The user has logged out with EMOTIV App.
9
The user approved your application in EMOTIV App.
10
The user declined your application in EMOTIV App.
13
A training profile was loaded for a headset using setupProfile
14
A training profile was unloaded for a headset using setupProfile.
15
A training profile was automatically unloaded by Cortex. This can happen if the headset was disconnected, or if the application that loaded this profile was disconnected from Cortex.
17
The user accepted the EULA in EMOTIV App.
19
The available disk space is low. Cortex send this warning when there is less then 1 GB available of the hard drive.
This warning was added in Cortex 2.2.1
20
The available disk space is critically low. Cortex send this warning when there is less then 300 MB available of the hard drive. When this happens Cortex automatically disconnect all the headsets. You cannot connect a headset until the user free up some space.
This warning was added in Cortex 2.2.1
21
The user has changed the opt-out configuration.
This warning was added in Cortex 2.2.1
22
Cortex has changed the opt-out configuration. This can happen when the license of the user is updated.
This warning was added in Cortex 2.2.1
26
The license of the user will expire in a few days.
This warning was added in Cortex 2.3.0
100 and 101
Cortex failed to connect to a headset. If the headset uses a Bluetooth connection, then you should try to disconnect the headset from the Bluetooth manager of the OS.
102
Cortex reached a timeout while trying to connect to a headset. This can happen if the wireless connection is of poor quality.
103
Cortex disconnected a headset because it didn't receive any data from this headset for more than 30 seconds. This can happen if the headset goes out of range of the computer, or if the wireless connection is of poor quality.
104
Cortex successfully connected to a headset.
110
Cortex successfully updated the configuration of a headset. See updateHeadset.
This warning was added in Cortex 2.4
111
Cortex failed to update the configuration of a headset. See updateHeadset.
This warning was added in Cortex 2.4
112
Cortex successfully updated a headset but the new configuration can only work with a USB dongle connection. The configuration is not compatible with a Bluetooth connection. See updateHeadset.
This warning was added in Cortex 2.5
113
Cortex failed to connect to an EPOC+ or EPOC X headset with Bluetooth. The configuration of the headset is not compatible with a Bluetooth connection. See controlDevice.
This warning was added in Cortex 2.5

{
"jsonrpc": "2.0",
"warning": {
"code": 0,
"message": {
"behavior": "Cortex has stopped all the subscriptions of session 866b8437-2380-4392-9a35-3d5957eaf95d.",
"sessionId": "866b8437-2380-4392-9a35-3d5957eaf95d"
}
}
}

{
"jsonrpc": "2.0",
"warning": {
"code": 1,
"message": {
"behavior": "Cortex has closed the session 866b8437-2380-4392-9a35-3d5957eaf95d.",
"sessionId": "866b8437-2380-4392-9a35-3d5957eaf95d"
}
}
}

{
"jsonrpc": "2.0",
"warning": {
"code": 2,
"message": "User jon.snow has already logged in to Cortex."
}
}

{
"jsonrpc": "2.0",
"warning": {
"code": 3,
"message": "User jon.snow has already logged out from Cortex."
}
}

{
"jsonrpc": "2.0",
"warning": {
"code": 9,
"message": "The access right to the cortex-examples has been granted"
}
}

{
"jsonrpc": "2.0",
"warning": {
"code": 10,
"message": "The access right to the cortex-examples has been rejected"
}
}

{
"jsonrpc": "2.0",
"warning": {
"code": 13,
"message": {
"behavior": "Profile is loaded",
"headset": "INSIGHT-12341234",
"profile": "foo"
}
}
}

{
"jsonrpc": "2.0",
"warning": {
"code": 14,
"message": {
"behavior": "Profile is unloaded",
"headset": "INSIGHT-12341234",
"profile": "foo"
}
}
}
{
"jsonrpc": "2.0",
"warning": {
"code": 15,
"message": {
"behavior": "Cortex has unloaded the profile",
"headset": "INSIGHT-12341234",
"profile": "foo"
}
}
}

{
"jsonrpc": "2.0",
"warning": {
"code": 17,
"message": "User jon.snow has accepted the EULA via EMOTIV App"
}
}

{
"jsonrpc": "2.0",
"warning": {
"code": 19,
"message": {
"behavior": "The available disk space is low.",
"rootPath": "/",
"volumeName": "MAC"
}
}
}
{
"jsonrpc": "2.0",
"warning": {
"code": 20,
"message": {
"behavior": "The available disk space is critically low. Cortex will disconnect all the headsets.",
"rootPath": "C",
"volumeName": "Windows"
}
}
}

{
"jsonrpc": "2.0",
"warning": {
"code": 21,
"message": {
"currOptOut": true,
"forceOptOut": false,
"message": "User has changed the Opt-out configuration.",
"optOutAvail": true
}
}
}
{
"jsonrpc": "2.0",
"warning": {
"code": 22,
"message": {
"currOptOut": true,
"forceOptOut": false,
"message": "The Opt-out configuration has been automatically changed due to change in license.",
"optOutAvail": true
}
}
}

{
"jsonrpc": "2.0",
"warning": {
"code": 100,
"message": {
"headsetId": "EPOCPLUS-3B9AXXXX",
"behavior": "Headset cannot be connected. Please try again."
}
}
}
{
"jsonrpc": "2.0",
"warning": {
"code": 101,
"message": {
"headsetId": "EPOCPLUS-3B9AXXXX",
"behavior": "Headset cannot be connected. Please try again."
}
}
}
{
"jsonrpc": "2.0",
"warning": {
"code": 102,
"message": {
"headsetId": "EPOCPLUS-3B9AXXXX",
"behavior": "Headset cannot be connected due to connection timeout."
}
}
}
{
"jsonrpc": "2.0",
"warning": {
"code": 113,
"message": {
"headsetId": "EPOCPLUS-3B9AXXXX",
"behavior": "Please disable motion data and set EEG rate to 128Hz in headset configuration when using Bluetooth connection, or use USB dongle."
}
}
}

{
"jsonrpc": "2.0",
"warning": {
"code": 103,
"message": {
"headsetId": "EPOCPLUS-3B9AXXXX",
"behavior": "Headset has been disconnected due to connection timeout."
}
}
}

{
"jsonrpc": "2.0",
"warning": {
"code": 104,
"message": {
"headsetId": "EPOCPLUS-3B9AXXXX",
"behavior": "The headset is connected"
}
}
}

{
"jsonrpc": "2.0",
"warning": {
"code": 110,
"message": {
"headsetId": "EPOCPLUS-3B9AXXXX",
"behavior": "Headset configuration is updated."
}
}
}

{
"jsonrpc": "2.0",
"warning": {
"code": 111,
"message": {
"headsetId": "EPOCPLUS-3B9AXXXX",
"behavior": "Headset configuration update failed."
}
}
}

{
"jsonrpc": "2.0",
"warning": {
"code": 112,
"message": {
"headsetId": "EPOCPLUS-3B9AXXXX",
"behavior": "This headset configuration cannot work with BTLE on this platform."
}
}
}
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On this page
Description
Warning Codes
Examples
0 - Data stream unsubscribed
1 - Session closed
2 - User login
3 - User logout
9 - App access granted
10 - App access declined
13 - Profile loaded
14 - 15 - Profile unloaded
17 - EULA accepted
19 - 20 - Disk space
21 - 22 - Opt-out configuration changed
100 - 101 - 102 - 113 - Failed to connect to a headset
103 - Headset disconnected
104 - Headset connected
110 - Headset update successful
111 - Headset update failed
112 - Headset configuration cannot work with Bluetooth