Access denied when reconstruction?

Hello,

I got the access denied error in the middle of the reconstruction process. Do you know why ?

I tried again after reloading the project and it worked fine but that’s rather strange.

Thank you.

 

As you’re saying it happened out of nowhere it is hard to solve such situation, but you could’ve possibly moved or changed some images that have been in the component while meshing or maybe the device these are on disconnected for a bit of time.