Azure.Core: Could not load file or assembly 'System.Memory.Data, Version=6.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. The system cannot find t he file specified.

Question

Hi ,

I am working on Azure function App for Blob Storage trigger. Previously it has been working but now when I started to work from scratch, azure function giving me following error:
***Azure.Core: Could not load file or assembly 'System.Memory.Data, Version=6.0.0.0, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51'. The system cannot find t he file specified.***Though for https triggers its working fine.
Below are the azure core tools and Function Runtime version:
Azure Functions Core Tools:Core Tools Version: 4.0.6280 Commit hash: N/A Function Runtime Version: 4.834.3.22875
Can you please guide what could be the issue here?
Thanks,
Sadaf

Answer 1

@Zaheer. Sadaf (Enterprise Services)

Glad to see that your issue is now resolved — thank you for the update

Just to summarize:

The issue was successfully resolved by following the steps outlined in this community thread.

The key resolution was to manually uninstall all existing versions of Azure Functions Core Tools, delete any remaining folders, and then reinstall the latest version of the [Core Tools].

Sadaf also highlighted that the issue happened when relying on the installation dialog alone — so as a precaution, it’s important to do a manual uninstall and cleanup before reinstalling.

Thanks again for sharing your experience — this will help other community members who might face the same issue!