Hello,
I am suddenly getting this message from all my projects (with different numbers). It is utterly wrong.
I occasionally got these messages before, but the project kept running anyway.
Now no project is doing anything,

I have assigned 10 GB to each project, and I have more than 1 TB free on my hard drive.

I saw a thread from 2017 reporting the same problem on Linux, but I'm not sure it was resolved, at least not in the forum...
There was some discussion about read-execute rights, though

I'm run-in BOINC 7.16.14 on a 27" iMac running MacOS 10.14.6.
Projects:
Milkyway@Home
PrimeGrid
NFS@Home
Einstein@Home
SETI@Home (though I know it's not running any tasks any more)

The problem may have started after the latest security update (2021 - 004 Mojave) of May 24.
I installed it a week ago. It could have applied some restrictions...

Under options>computing preferences what are your settings for disk usage?

In the manager, what does it show when you are in the Disk tab?

Edit: One other thing to check is whether you have had any tasks for a project crash. In an ideal world crashed tasks clean up after themselves but that isn't always the case. (while they were from the testing branch of CPDN so problems to some degree expected I have just deleted over 2GB from 4 files which would have been uploaded had the two tasks continued to run.)

Thank you, Dave

I had 5 GB disk usage set locally (default?), Assigning 10 GB to e.g. Einstein@Home didn't help, as BOINC was using 4.98 GB in total.
Telling BOINC Manager to use web settings helped.

As said above, virtually all assigned 5 GB were in use. Einstein@Home uses 4.64 GB.
The project folder has 1216 objects - there's possibly a lot of debris from crashes there. I have had quite a few tasks crashing...
I'll examine later once I figure out which files are obsolete. A hint may be useful here... :-)

BTW a couple of weeks ago my client found a big prime number (1 013 872 digits). Awesome!

/Anders

Hint:
Look at the names of the tasks either running or waiting to run.
Anything else sitting there has crashed. :)

Will do.