Im having a bit of trouble with the Plots Inside Fields. Im using a larger field as a town and then smaller fields for people to own houses. The smaller fields are owned or allowed to other players where the larger one is owned by me only.
The smaller plots owned or allowed by players cant build or place blocks
The smaller plots start working only if the larger one is gone...

What am I doing wrong?
The owner of the smaller fields should take priority right?
These are the 2 fields

• title: Massive 100x100
  block: 79
  radius: 100
  custom-height: 100
  prevent-fire: true
  prevent-place: true
  prevent-destroy: true
  prevent-explosions: true
  prevent-mob-damage: true
  prevent-mob-spawn: true
  rollback-explosions: true
  welcome-message: true
  farewell-message: true
  remove-mob: true
  prevent-pvp: true
  no-conflict: true
  limits:
  • 0
  • 10
  • 30
• title: Minature 3x3
  block: 14
  radius: 3
  custom-height: 50
  prevent-fire: true
  prevent-place: true
  prevent-destroy: true
  prevent-explosions: true
  prevent-mob-damage: true
  prevent-mob-spawn: true
  rollback-explosions: true
  welcome-message: true
  farewell-message: true
  no-conflict: true
  limits:
  • 0
  • 10
  • 30

Ok cool, thanks for the info and all the help you have given me :).

I will probably use clans/groups function to work it all :)

And again thanks, you have helped me a great deal

You need to add these flags to your field: Miniature 3x3
   sub-plot: true
    allowed-only-inside: [Massive 100x100]

Additional tweaking:

I do not think it's necessary to have rollback-explosions: true when you already have prevent-explosions: true
The redundancy might mess something up? Only phaed420 (Manager, Author) would know.

Ok, thanks very much for your help, I dont remember seeing the "sub-plot: true" tag in the help. ^_^;

One more thing, sorry :P. If I use the "sub-plot: true" tag can I use them anywhere as standalone protection still?

Woh you are right, sub-plot: true is not listed in the documentation, I only knew of it because it was in the default/example config.yml file.

It's possible this was changed to allowed-only-inside: [Your Town Protection Subplot Field Name] and the creator forgot to remove sub-plot: true from the default config file. The field allowed-only-inside was missing from your config file anyways, so I would try to first use this instead of sub-plot: true (which might not do anything at all). Worth a shot.

To answer you question, no, I do not believe sub-plots are placeable as standalone protection.

Ok well I tested this out and the smaller one still doesnt let its owner place or destroy inside it

All I want is a bigger town area protected area that cant be griefed but I want players to own small plots inside this bigger one. I think the prevent-place and the prevent-destroy in the bigger one is stopping people building in the smaller one even though they own it.

• title: Mark Protection
  block: 3511
  radius: 30
  custom-height: 50
  prevent-fire: true
  prevent-place: true
  prevent-destroy: true
  prevent-explosions: true
  prevent-mob-damage: true
  prevent-mob-spawn: true
  welcome-message: true
  farewell-message: true
  no-conflict: true
  limits:
  • 0
  • 10
  • 30
• title: M 3x3 Protection
  block: 3510
  radius: 3
  custom-height: 50
  prevent-fire: true
  prevent-place: true
  prevent-destroy: true
  prevent-explosions: true
  prevent-mob-damage: true
  prevent-mob-spawn: true
  welcome-message: true
  farewell-message: true
  no-conflict: true
  sub-plot: true
  allowed-only-inside: [Mark Protection]
  limits:
  • 0
  • 10
  • 30

What blocks are 3511 and 3510? Are those valid block IDs?

I am on 8.2.8. I think its the prevent-destroy/place in the bigger field that is stopping everything

Yes, it is wool and the colour. It is on the PS Bukkit page. It works because Im using it for other PS blocks and they work perfectly.

Ok, I'll try using your config on my server tonight once I'm the only one online.
Also, what version of PS are you using? I had to switch back to 8.2.8 because 8.3 isn't working for me at the moment.

I did some further testing with the default config.yml and used the example town and plot on a new server and I ran across the same problem. The owner of the smaller field cant do anything at all. I found out that they can destroy the PS they own though

EDIT:
It seems to work with these settings. the thing is that the bigger one has no protection from grief

title: TestProtection
block: 3511
radius: 30
custom-height: 70
prevent-fire: true
prevent-explosions: true
prevent-mob-damage: true
prevent-mob-spawn: true
welcome-message: true
farewell-message: true
cuboid: true
no-conflict: true
can-change-owner: true
enable-on-src: true

title: Test Plot
block: 3510
radius: 3
custom-height: 50
sub-plot: true
allowed-only-inside:

• TestProtection
  prevent-fire: true
  prevent-place: true
  prevent-destroy: true
  prevent-explosions: true
  prevent-mob-damage: true
  prevent-mob-spawn: true
  welcome-message: true
  farewell-message: true
  enable-on-src: true
  no-conflict: true
  can-change-owner: true

I was thinking that PS is actually working normal for you.
I will give you an example of how I use it.

This is a config I tested with: http://dev.bukkit.org/paste/4845/
It includes block protection at all levels!

I am now using PS version 8.3
I upgraded to Bukkit 1.2.3-RO.1 (beta) and it is working very well.
http://dl.bukkit.org/downloads/bukkit/

How I plan to use subplots:

Players (leaders / server admins) place Town protection blocks.
Their clan has permission to build here. (/ps coowner add group c:clanname) (SimpleClans plugin)
Or if you don't use SimpleClans, you can set the group permissions used in any permission plugin.

A clan member can then place a Sub-Plot field in the Town.
This sub-plot does not have the clan added as a coowner, so only that person can build there.

Now this is just a working theory I tested with my friend. I'll be using it in practice soon.
Let me know if I'm missing anything.