> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://faq.bimandco.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# When I install the BIM&CO plugin, why does the error message "Cannot expand pf64 constant on this version of Windows" appear?

![error app 32 bit](https://storage.crisp.chat/users/helpdesk/website/eeaa57ab-9bed-46cf-9a45-14ce127caab6/454e2228-9357-4b4e-843e-a227171968bc.png)
This message appears if your version of Windows doesn't support our plugin installation program. Our software is only compatible with 64-bit versions of Windows 7, 8 and 10.