Hi,
I am using a 4 layer PCB with GND and Power on layer 2 and 3 respectivelyand top and bottom for routing signals. All components I use are surface mount and I connect ground of all those components by layer 2. power of all components by layer 3 using vias over the components copper pads. After flooding when I look for connectivity error it shows as follows.
CONTINUITY ERRORS REPORT --
Isolated subnets for: 24V_DIGITAL
*** subnet # 1
PCI6.B2
*** subnet # 2
TP12.1
*** subnet # 3
PCI7.B2
*** subnet # 4
PCI7.B1
*** subnet # 5
PCI6.B1
*** subnet # 6
PCI5.B2
*** subnet # 7
PCI5.B1
*** subnet # 8
PCI4.B2
*** subnet # 9
PCI3.B1
*** subnet # 10
PCI2.B2
*** subnet # 11
PCI2.B1
*** subnet # 12
R3.1 F4.2
*** subnet # 13
PCI3.B2 PCI4.B1 R6.1 TP9.1
Isolated subnets for: SLOT_1_24V
*** subnet # 1
TP8.1
*** subnet # 2
DRILL(TP8.1 L1) F1.2 PCI1.B1 PCI1.B2 TP2.1 R1.1 R2.1
Isolated subnets for: GND
*** subnet # 1
J5.2
*** subnet # 2
J5.1
*** subnet # 3
D5.2
*** subnet # 4
J1.6
*** subnet # 5
J1.5
*** subnet # 6
J1.4
*** subnet # 7
L1.4 VIA(23.1,20.5 L1)
*** subnet # 8
TP_C3.1 J14.2 J2.4
*** subnet # 9
C5.1 C12.1
*** subnet # 10
C1.2 C10.2 C9.2 C6.2 L2.4
*** subnet # 11
LED1.2 L4.2
Isolated subnets for: 24V_SERVO
*** subnet # 1
TP13.1
*** subnet # 2
PCI2.A2
*** subnet # 3
PCI7.A6
*** subnet # 4
PCI7.A5
*** subnet # 5
PCI7.A4
*** subnet # 6
PCI7.A3
*** subnet # 7
PCI7.A2
*** subnet # 8
PCI7.A1
*** subnet # 9
PCI6.A6
*** subnet # 10
PCI6.A5
*** subnet # 11
PCI6.A4
*** subnet # 12
PCI6.A3
*** subnet # 13
PCI6.A2
*** subnet # 14
PCI6.A1
*** subnet # 15
PCI5.A6
*** subnet # 16
PCI5.A5
*** subnet # 17
PCI5.A4
*** subnet # 18
PCI5.A3
*** subnet # 19
PCI5.A2
*** subnet # 20
PCI5.A1
*** subnet # 21
PCI4.A6
*** subnet # 22
PCI4.A5
*** subnet # 23
PCI4.A4
*** subnet # 24
PCI4.A3
*** subnet # 25
PCI4.A2
*** subnet # 26
PCI3.A6
*** subnet # 27
PCI3.A5
*** subnet # 28
PCI3.A4
*** subnet # 29
PCI3.A3
*** subnet # 30
PCI3.A2
*** subnet # 31
PCI3.A1
*** subnet # 32
PCI2.A6
*** subnet # 33
PCI2.A5
*** subnet # 34
PCI2.A4
*** subnet # 35
PCI2.A3
*** subnet # 36
PCI2.A1
*** subnet # 37
PCI4.A1 TP3.1 R7.1
*** subnet # 38
R4.1 F2.2 VIA(45.4,122.1 L1)
Isolated subnets for: 24V_FILTERED
*** subnet # 1
J13.2
*** subnet # 2
J13.1
*** subnet # 3
D6.4 VIA(1.7,70.2 L1)
*** subnet # 4
TP4.1 R5.1 VIA(-3,76.5 L1) VIA(-2.9,75.3 L1) D5.1 VIA(-5.7,69.9 L1) D1.4 L4.1 VIA(-2.4,82 L1) VIA(-2.4,80 L1)
Isolated subnets for: +24V_SWITCH
*** subnet # 1
J6.1
*** subnet # 2
R8.1 VIA(3.8,61.7 L1) VIA(3.8,60.7 L1) D6.3
*** subnet # 3
VIA(-0.8,61.7 L1) D6.1 VIA(-0.8,60.6 L1)
*** subnet # 4
D1.3 VIA(-3.3,61.6 L1) VIA(-3.3,60.6 L1)
*** subnet # 5
D1.1 VIA(-7.9,61.7 L1) VIA(-7.9,60.6 L1)
*** subnet # 6
C13.2 C5.2 J6.2
Isolated subnets for: 24V
*** subnet # 1
J4.2
*** subnet # 2
J1.3
*** subnet # 3
J4.1
*** subnet # 4
J1.2
*** subnet # 5
J1.1
Isolated subnets for: DIGITAL_GND
*** subnet # 1
TP10.1
*** subnet # 2
TP14.1
*** subnet # 3
PCI7.B30
*** subnet # 4
PCI7.B27
*** subnet # 5
PCI7.B24
*** subnet # 6
PCI7.B21
*** subnet # 7
PCI7.B18
*** subnet # 8
PCI7.B15
*** subnet # 9
PCI7.B12
*** subnet # 10
PCI7.A26
*** subnet # 11
PCI7.A23
*** subnet # 12
PCI7.A20
*** subnet # 13
PCI7.A17
*** subnet # 14
PCI7.A14
*** subnet # 15
PCI7.A11
*** subnet # 16
PCI6.B30
*** subnet # 17
PCI6.B27
*** subnet # 18
PCI6.B24
*** subnet # 19
PCI6.B21
*** subnet # 20
PCI6.B18
*** subnet # 21
PCI6.B15
*** subnet # 22
PCI6.B12
*** subnet # 23
PCI6.A26
*** subnet # 24
PCI6.A23
*** subnet # 25
PCI6.A20
*** subnet # 26
PCI6.A17
*** subnet # 27
PCI6.A14
*** subnet # 28
PCI6.A11
*** subnet # 29
PCI5.B30
*** subnet # 30
PCI5.B27
*** subnet # 31
PCI5.B24
*** subnet # 32
PCI5.B21
*** subnet # 33
PCI5.B18
*** subnet # 34
PCI5.B15
*** subnet # 35
PCI5.B12
*** subnet # 36
PCI5.A26
*** subnet # 37
PCI5.A23
*** subnet # 38
PCI5.A20
*** subnet # 39
PCI5.A17
*** subnet # 40
PCI5.A14
*** subnet # 41
PCI5.A11
*** subnet # 42
PCI4.B30
*** subnet # 43
PCI4.B27
*** subnet # 44
PCI4.B24
*** subnet # 45
PCI4.B21
*** subnet # 46
PCI4.B18
*** subnet # 47
PCI4.B15
*** subnet # 48
PCI4.B12
*** subnet # 49
PCI4.A26
*** subnet # 50
PCI4.A23
*** subnet # 51
PCI4.A20
*** subnet # 52
PCI4.A17
*** subnet # 53
PCI4.A14
*** subnet # 54
PCI4.A11
*** subnet # 55
PCI3.B30
*** subnet # 56
PCI3.B27
*** subnet # 57
PCI3.B24
*** subnet # 58
PCI3.B21
*** subnet # 59
PCI3.B18
*** subnet # 60
PCI3.B15
*** subnet # 61
PCI3.B12
*** subnet # 62
PCI3.A26
*** subnet # 63
PCI3.A23
*** subnet # 64
PCI3.A20
*** subnet # 65
PCI3.A17
*** subnet # 66
PCI3.A14
*** subnet # 67
PCI3.A11
*** subnet # 68
PCI1.B48
*** subnet # 69
PCI1.B45
*** subnet # 70
PCI1.B42
*** subnet # 71
PCI1.B39
*** subnet # 72
PCI1.B36
*** subnet # 73
PCI1.B33
*** subnet # 74
PCI1.B30
*** subnet # 75
PCI1.B27
*** subnet # 76
PCI1.B24
*** subnet # 77
PCI1.B21
*** subnet # 78
PCI1.B18
*** subnet # 79
PCI1.B15
*** subnet # 80
PCI1.B12
*** subnet # 81
PCI1.A47
*** subnet # 82
PCI1.A44
*** subnet # 83
PCI1.A41
*** subnet # 84
PCI1.A38
*** subnet # 85
PCI1.A35
*** subnet # 86
PCI1.A32
*** subnet # 87
PCI1.A29
*** subnet # 88
PCI1.A26
*** subnet # 89
PCI1.A23
*** subnet # 90
PCI1.A20
*** subnet # 91
PCI1.A17
*** subnet # 92
PCI1.A14
*** subnet # 93
PCI2.B30
*** subnet # 94
PCI2.B27
*** subnet # 95
PCI2.B24
*** subnet # 96
PCI2.B21
*** subnet # 97
PCI2.B18
*** subnet # 98
PCI2.B15
*** subnet # 99
PCI2.B12
*** subnet # 100
PCI2.A26
*** subnet # 101
PCI2.A23
*** subnet # 102
PCI2.A20
*** subnet # 103
PCI2.A17
*** subnet # 104
PCI2.A14
*** subnet # 105
PCI2.A11
*** subnet # 106
L1.3 VIA(25.9,20.5 L1)
*** subnet # 107
C3.1 VIA(29.2,20.9 L1)
*** subnet # 108
C15.2 VIA(32.1,22.6 L1)
*** subnet # 109
LED3.2 J7.2 J9.2 VIA(50.5,17.1 L1)
*** subnet # 110
C4.2 TP_C2.1
*** subnet # 111
LED2.2 C21.2 C18.2 C17.1 VIA(0.2,88 L1) L4.3
Isolated subnets for: SERVO_GND
*** subnet # 1
TP11.1
*** subnet # 2
PCI7.B10
*** subnet # 3
PCI7.B9
*** subnet # 4
PCI7.A10
*** subnet # 5
PCI7.A9
*** subnet # 6
PCI7.A8
*** subnet # 7
PCI7.A7
*** subnet # 8
PCI6.B10
*** subnet # 9
PCI6.B9
*** subnet # 10
PCI6.A10
*** subnet # 11
PCI6.A9
*** subnet # 12
PCI6.A8
*** subnet # 13
PCI6.A7
*** subnet # 14
PCI5.B10
*** subnet # 15
PCI5.B9
*** subnet # 16
PCI5.A10
*** subnet # 17
PCI5.A9
*** subnet # 18
PCI5.A8
*** subnet # 19
PCI5.A7
*** subnet # 20
PCI4.B10
*** subnet # 21
PCI4.B9
*** subnet # 22
PCI4.A10
*** subnet # 23
PCI4.A9
*** subnet # 24
PCI4.A7
*** subnet # 25
PCI3.B10
*** subnet # 26
PCI3.B9
*** subnet # 27
PCI3.A10
*** subnet # 28
PCI3.A9
*** subnet # 29
PCI3.A8
*** subnet # 30
PCI3.A7
*** subnet # 31
PCI2.B10
*** subnet # 32
PCI2.B9
*** subnet # 33
PCI2.A10
*** subnet # 34
PCI2.A9
*** subnet # 35
PCI2.A8
*** subnet # 36
PCI2.A7
*** subnet # 37
LED4.2
*** subnet # 38
PCI4.A8 J8.2
*** subnet # 39
C11.2 C8.2 C7.1 L2.3 TP_C1.1
Isolated subnets for: 24V_SAFE
*** subnet # 1
J11.1
*** subnet # 2
J11.2
*** subnet # 3
L1.1
*** subnet # 4
L2.1 VIA(23.4,123.2 L1)
Isolated subnets for: EARTH
*** subnet # 1
J3.1
*** subnet # 2
J12.2
*** subnet # 3
J3.2
*** subnet # 4
C12.2 C13.1 C1.1 C10.1 C9.1 C6.1 PCI2.B49 PCI1.B49 PCI3.B49 PCI4.B49 PCI5.B49 PCI7.B49 PCI6.B49 J12.1 VIA(-3.3,58 L1) VIA(-4.6,58 L1).
What's the mistake I have done? Please help me on this topic.