Hi and thanks very much for that.

It produces in the list column:

1>2

1>2>3

1>2>4

1>2>5

1>2>4>8

1>2>3>6

1>2>3>7>9

1>2>3>7>10

What I need it to produce is:

1>2

1>2>3

1>2>3>6

1>2>3>7

1>2>3>7>9

1>2>3>7>10

1>2>4

1>2>4>8

1>2>5

I've tried various sorting but I can't make it do that. And although it's producing:

1>2

1>2>3

1>2>4

1>2>5

it is missing out:

1>2>3>7