Packaging Error


I’m working on an Archviz project. I don’t have a big knowledge about developing and programming, so I hope you can help me.

Everything was working fine, I packed several versions of the project before with no problems.

But suddenly, I can’t pack anymore. The only weird thing I did, is changing the Preview Rendering Level to Mobile/HTML5 (just being curious), but before it was done, going back to Shader Model 5. Then, I left cooking overnight, and when I wanted to pack today it doesn’t work anymore.
I’ve even rescued a backup version but still not working.

Any help would be appreciated.

This is the Output log:
link text

Thanks a lot.

Hi again, just managed to solve the problem.

I had read many threads before, but after publishing my quesion I kept looking.

It was solved just removing the Intermediate and Saved folders, in case anyone has the same problem.