If you find that your computer’s applications are frequently crashing and it takes longer to do simple tasks, then you might be wondering how to free up RAM on your computer.
Are you sharing the license with other users? In that case, someone else might be using the license. When you use up all of the available RAM on your computer, you may notice that your device struggles to complete tasks. If you can't solve with 6 cores, then there is a license issue. An HPC Pack adds 8 cores to the base number. I don't recall the number of cores 19.2 allowed without HPC, it may have been 4 or 2. If you get an error when you try to solve with 11 cores, try using 10 cores. Using every core can be slower than using one less as rwoolhou said. For example, going from 2 to 4 cores might solve in 60% of the time of 2 cores, then going from 4 cores to 8 cores might solve in 75% of the time of 4 cores. I have run the same model with different number of cores and there are diminishing returns as the core count goes up, especially if you have large contact areas. click the Advanced button and type in 11 for Number of Cores. If you mean you are using Mechanical Workbench, then in Mechanical, you go to Tool, Solve Process Settings.
