CRM never stops amazing me with its error messages.

The scenario was I was trying to sync a really old development environment in our network to client’s latest set of customisations.

Client have their own IT team and kept moving changes, in order to support them we needed to sync our environment.

Solution moved without any issues. The moment I click Publish, CRM threw me an error never seen before by me:

I mean, I was confused. How can CRM on premise have an error like CRM online, it’s our own server? So why a restriction error like this:

Then, while inspecting various other things I noticed C: on server has run out of space. I got the space cleared and the weird error was gone.

Hope it helps!