While importing a mesh from patran all groups got imported as seperatre zones in Fluent but surprisingly I notice some warnings shown below and the two following zones got split into two additional zones. Can anybody help me to say why it is happening so. I want to avoid them happening

Thanks in adavance Laxminarayana

A snap shot of import work....

PATRAN file to RAMPANT file

Read 187642 nodes, 204246 elements, 14 groups.

33884 quad elements 170362 hex elements 187642 nodes.

280 quadrilateral velocity-inlet faces, zone 1.

4190 quadrilateral wall faces, zone 2.

4190 quadrilateral wall faces, zone 3.

320 quadrilateral velocity-inlet faces, zone 4.

80 quadrilateral velocity-inlet faces, zone 5.

200 quadrilateral outflow faces, zone 6.

480 quadrilateral outflow faces, zone 7.

240 quadrilateral outflow faces, zone 8.

200 quadrilateral outflow faces, zone 9.

1680 quadrilateral wall faces, zone 10.

1700 quadrilateral wall faces, zone 11.

268 quadrilateral wall faces, zone 13.

268 quadrilateral wall faces, zone 14. 493888 quadrilateral interior faces, zone 16.

20044 quadrilateral wall faces, zone 17. 170362 hexahedral cells, zone 15.

Building...

grid, Note: Separating wall zone 13 into zones 13 and 12.

s1_hole -> s1_hole (13) and s1_hole:012 (12) Note: Separating wall zone 14 into zones 14 and 18.

s2_hole -> s2_hole (14) and s2_hole:018 (18)

materials,

interface,

domains,

zones,

s2_hole:018

s1_hole:012

default-exterior

default-interior

default-fluid

s2_hole

s1_hole

l_holes

no_slip

outlet_2

outlet_3

outlet_4

outlet_1

inlet_3

inlet_2

periodic_2

periodic_1

inlet_1 Warning: Thread 18 has 50 contiguous regions. Warning: Thread 12 has 50 contiguous regions.

creating s2_hole:018-shadow

creating s1_hole:012-shadow

shell conduction zones, Done.

The problem is with....

a) Warning: Thread 18 has 50 contiguous regions. Warning: Thread 12 has 50 contiguous regions.

creating s2_hole:018-shadow

creating s1_hole:012-shadow

b) grid, Note: Separating wall zone 13 into zones 13 and 12.

s1_hole -> s1_hole (13) and s1_hole:012 (12) Note: Separating wall zone 14 into zones 14 and 18.

s2_hole -> s2_hole (14) and s2_hole:018 (18)