> ## Documentation Index
> Fetch the complete documentation index at: https://notevil.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# CAPLfunctionGetA664Message

# GetA664Message

[Valid for](../../../Shared/FeatureAvailability.md):  CANoe DE • CANoe4SW DE

## Function Syntax

```plaintext theme={null}
long GetA664Message (PDUobject aPDU, a664Message aMessage);
```

## Description

This function can be used within an "ON PDU"-handler to retrieve the A664Message object, to which the PDU corresponds.

The a664Message object then allows to retrieve the various runtime parameters like BAG or error flags via message selectors.

**Note**: the message ID is available, but not the message name.

## Parameters

* **`<aPDU>`**: The `<this>` object of the PDU-handler
* **`<aMessage>`**: The a664Message object which getting the current message information

## Return Values

* **`<success>` - 0**: Information about corresponding message was successfully retrieved
* **-1**: Wrong bus system (callback not from an AFDX channel)
* **-3**: PDU-object (this) not of correct type or not initialized properly
* **-6**: Frame or PDU not available

## Example

```plaintext theme={null}
on PDU *
{
  A664Message *msg;
  getA664Message(this, msg);
  writeEx(-3,1, "received PDU %s with distance: %d", this.name, msg.Distance);
}
```