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TAPI methods and functions may return a TAPI_E_ constant. These constants indicate the outcome of an API call.
| Constant/value | Description |
|---|---|
|
The buffer passed in to this method was not big enough. |
|
No items exist that match the request. |
|
An invalid media type was passed in. |
|
The operation failed for an unspecified reason. |
|
The device is already in use. |
|
No call appearance is available. |
|
Too many call completions are outstanding. |
|
The conference is full and more members cannot be added. |
|
The dial modifier is not supported. |
|
The device is already in use. |
|
The address is invalid or not properly formatted. For example, if address type is LINEADDRESSTYPE_PHONENUMBER, this error code would mean that the data entered did not appear to be a real phone number. |
|
The operation is not permitted in the current address state. |
|
The LINECALLPARAMS structure is invalid. |
|
The call privilege is invalid. |
|
The operation is not permitted in the current call state. |
|
The calling card is invalid. |
|
The call completion ID is invalid. |
|
The country or region code is invalid. |
|
The device class identifier is invalid. |
|
The dialing parameters are invalid. |
|
The digits are invalid. |
|
The group pickup ID is invalid. |
|
The ___location ID is invalid. |
|
The message ID is invalid. ( |
|
The park ID is invalid. |
|
The rate is invalid. |
|
The timeout value is invalid. |
|
The tone is invalid. |
|
An invalid list was passed as a parameter. |
|
An invalid mode was passed as a parameter. |
|
The call is not part of a conference. |
|
The device was removed, or the device class is not recognized. |
|
No Assisted Telephony requests are pending. |
|
The application does not have OWNER privilege on the call. |
|
The application is not registered to handle requests. |
|
The request queue is already full. |
|
The call handoff failed because the specified target was not found. |
|
No higher priority target exists for the call handoff. |
|
The amount of user-user information exceeds the maximum permitted. |
|
The operation cannot be completed until all TAPI applications shut down and reinitialize. |
|
You are not permitted to call this number. |
|
The calling card number or other billing information was rejected. |
|
The device-specific feature is invalid. |
|
The button or lamp ID is invalid. |
|
The button state is invalid. |
|
The data segment ID is invalid. |
|
The hookswitch device ID is invalid. |
|
The call was disconnected. |
|
No program is available to handle the request. |
|
The queue of call requests is full. |
|
The called number is busy. |
|
The called party does not answer. |
|
The called number could not be reached. |
|
The request failed for unspecified reasons. |
|
The request was cancelled. |
|
The application's privilege level is invalid for the current operation. |
|
The TERMINAL_DIRECTION passed in was invalid. |
|
The terminal passed in was invalid for this operation. |
|
The terminal class is invalid. |
|
The service provider was removed. |
|
The maximum number of streams was reached. |
|
The operation could not be performed because it requires terminals to be selected. |
|
The operation could not be performed because the terminal is in use. |
|
The operation could not be performed because it requires the stream to be stopped. |
|
The maximum number of terminals has been reached. |
|
The stream passed in was invalid for this operation. |
|
The call failed because of a timeout. The timeout interval is two minutes. |
|
The ACD Proxy has removed this group. Operations on this object are invalid. |
|
The ACD Proxy has removed this queue. Operations on this object are invalid. |
|
The Agent object was created with CreateAgent and has no ID. If an ID is needed, use CreateAgentWithID. |
|
The agent ID is invalid. |
|
The agent group is invalid. |
|
The agent password is invalid. |
|
The agent state is invalid. |
|
The agent activity is invalid. |
|
The registry setting is corrupt. |
|
The peer for one of these bridge terminals has already been assigned. |
|
The peer for this bridge terminal must be set to complete this operation. |
|
There is no event in the MSP's event queue. |
|
This address does not support the specified address type. |
|
A resource needed to fulfill the request is not available. |
|
The phone is not open. |
|
The specified call is not currently selected. |
|
This information is not available for this type of event. |
|
The format is unknown. |
|
The operation is not permitted in current stream state. |
|
The operation requested is not permitted for the current state. |
|
The object has not been initialized. |
Requirements
| Requirement | Value |
|---|---|
| TAPI version |
Requires TAPI 3.0 or later |
| Header |
|