# InvalidArgumentError Class

> A caller passed an argument the library cannot use.

- Product: Adobe PDF Library 21
- Language: Modern C++
- Version: 21.5.0
- HTML page: https://docs.datalogics.com/apdfl21/ModernCPP/21.5.0/class/InvalidArgumentError
- Version index: https://docs.datalogics.com/apdfl21/ModernCPP/21.5.0/llms.txt

```cpp
class InvalidArgumentError : Error
```

**Namespace:** `datalogics_interface`

**Inherits from:** [`Error`](https://docs.datalogics.com/apdfl21/ModernCPP/21.5.0/class/Error.md)

## Description

A caller passed an argument the library cannot use.

## Constructors

### InvalidArgumentError

```cpp
datalogics_interface::InvalidArgumentError::InvalidArgumentError(const std::string &message)
```

*constructor*

**Parameters**

- `message` (`const std::string &`)

## Methods

### get_error_code

```cpp
DL_ERROR_MEMBER int datalogics_interface::Error::get_error_code() const noexcept
```

**Returns:** `DL_ERROR_MEMBER int`

The Adobe PDF Library error code, or 0 when the failure carries none.

Decode the value with the APDFL `ErrGetSeverity`, `ErrGetSystem` and `ErrGetCode` macros, or compare it against a whole code.