System.NullReferenceException: Object reference not set to an instance of an object.

[enriquerdz]

System.NullReferenceException: Object reference not set to an instance of an object.
at NetBarcode.Types.EAN13.GetEncoding()} | System.NullReferenceException

CODE:

var barcode = new Barcode(newStringValue, TypeNet.EAN13, true); <--- Exception origen

use implement

using NetBarcode;
using TypeNet = NetBarcode.Type;

Ambient:

Ubuntu 20.04
NetCore 3.1

[Tagliatti]

Hi, you install some native dependencies?

sudo apt install libc6-dev 
sudo apt install libgdiplus

[enriquerdz]

I have installed the depencencies that you comment and it keeps giving the error.

[Tagliatti]

If you use (new Barcode("543534")).GetImage(); it works?

[CarlosEvandro-Fi]

In my case this NullReferenceException was caused by country three digit code check, because the first three digit are 000, at:
https://github.com/Tagliatti/NetBarcode/blob/master/NetBarcode/Types/EAN13.cs
line 90
Its not stopped my app because the next check of two digit code does not throw an exception.