> For the complete documentation index, see [llms.txt](https://docs.apryse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apryse.com/core/get-started/faq/asp-net-precompile-during-publishing.md).

# ASP.NET precompile error during publishing

World's #1 PDF SDK Library for Web, Mobile, Server, Desktop

64 bit PDFNet.dll works fine from a Website ASP.NET project but when attempting to use the publish feature with the pre-compilation option you may get the following error:

`Could not load file or assembly 'PDFNet' or one of its dependencies. An attempt was made to load a program with an incorrect format. WebSite ASPNETCOMPILER 0`

Getting the 64 bit PDFNet.dll to successfully publish with “Precompile during publishing” option enabled requires adding the following to publish profile in the App\_Data folder:

{% tabs %}
{% tab title="Shell" %}
{% code lineNumbers="true" %}

```sh
<AspnetCompilerPath>C:\Windows\Microsoft.NET\Framework64\v4.0.30319</AspnetCompilerPath>
```

{% endcode %}
{% endtab %}
{% endtabs %}


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