Not likely the cause of the message, but 4 GB memory is not much for an 8 processor machine which is potentially running lots of background tasks besides ArchiCAD. So, virtual memory swapping on your hard drive might be part of the slow-down.
Is the issue repeatable? If so, run Activity Monitor while this is happening and (cmd-1) check the System Memory usage - amount free - and the Disk Activity read/write rates prior to the error appearing.
Assume you have lots of free space on your disk? The AC default location for the temporary folder for AC 10 is a hidden subfolder of the root of the boot drive. If you've partitioned your drive in such a way that the boot drive is short on space, that might be related to the problem?
Karl
AC 28 USA and earlier • macOS Sequoia 15.2, MacBook Pro M2 Max 12CPU/30GPU cores, 32GB
One of the forum moderators