Have laptop with Windows10 and PCLinuxOS. Have made two empty partitions, sda8 and sda9 on
which I would like to install Mint 17.3 kde 64. However, when the install routine gets to
the partition point, I tell it manual. sda8 and sda9 are already blank and formatted ext4,
and labeled mint/ and /mint_home. Anyway, I say continue, and a popup say there is no mount point for the filesystem, or words to that effect, and no obvious way to solve it.
I wish to keep both Windows and PCLOS, and I have told the Mint installer that I want the
Mint boot to be on sda8, as I am going to do a grub update from PCLOS--I want to use the
PCLOS grub to select the system to boot--Windows, PCLOS or Mint. (Want to use Mint 17 as
it has long term support.)
So how do I get around this problem?

Thanx for your help, folks!

--doug

Vague waffling like this won't get you any help. What is the exact message.
With a (native) Win10 machine it's most likely UEFI - that means you will also need to assign the EFI partition as part of your partitioning. I'd be surprised if Mint don't have an applicable tutorial somewhere.

Hi Doug...

Just as a suggestion, you might want to change your username using the instructions at the top of the page here, lest your email inbox ends up with a boatload of SPAM in the very near future.

Regards...

The accepted default for the partition for the filesystem is the root symbol ( / ). Try that. I've never tried using anything but /. Not sure it will work but you might keep trying other things and posting the results if you want. Otherwise, use the / symbol. I don't know why you would want to label it /mint and /mint_home as you would obviously know when booting that you are on Mint. If you want access to mint from your other system, PCLinuxOS, you can create a mint and mint-home mount point there and an entry in /etc/fstab.

As yancek said, you need to designate the root partition as /
When you chose the partition you want in the installation program, double-click on it (or click the Change button) to chose either / or /home.

By the way, if you format the partition during installation, your partition label will be lost, and you will have to re-create it later.

Judging from your labels, I guess you want your root directory to be stored on your "/mint" partition and your home directory to be stored on your "/mint_home" partition. If that is the case, as was pointed out earlier, you need to specify on which directory you want to mount each of your two partitions. When you click on one of the partitions in the installer there should be a button saying "Mount point" or something along those lines.

For your "/mint" partition, select For your "/mint_home" partition, select