I got your sample working, but I had to modify the data ouputs on the 0 to N field. The problem is I can't get the first line of the variable field to match correctly.

Why is "Secondary Sector Information" and "Slot" showing up in the output and how can I get it out?

use strict;
use warnings;

local $/= "\n=";

while (my $line = <DATA>)
{
print "\n------------------------------\n";
if ($line =~ m/Primary \(Reporting\) Cp\s*:\s*((?:(?!Set).)*)Set\s*:\s
+*((?:(?!Car).)*)Car\s*:\s*((?:(?!Ref).)*)/si)
{
    print "Cp:$1 - Set:$2 - Car:$3";
}

if ($line =~ m/Phase\s*:\s*((?:(?!Strength).)*)Strength\s*:\s*((?:(?!\
+n).)*)/si)
{
    print "\nPhase:$1 - Strength:$2\n";
}


while ($line =~ m/(?<!Primary \(Reporting\) )(?<!Secondary Sector)Keep
+\s*:\s*((?:(?!offset).)*)offset\s*:\s*((?:(?!Strength).)*)Strength\s*
+:\s*((?:(?!Ref).)*)/gsi)
{
    print "Keep:$1 - offset:$2 - Strength:$3\n";
}
print "\n------------------------------\n";

}

__DATA__
====================================================================
Record: 9851329   Version:  2   Timestamp: Sat Feb 11 22:39:43 2006
Primary (Reporting) Cp: 113  Set: 2 Car: 1  Ref: yes  Event:   9922
Missing P:  Keep: 1  Phase: 0x2fdf  Strength: 24
Secondary Sector Information:
====================================================================
Record: 9851330   Version:  2   Timestamp: Sat Feb 11 22:39:43 2006
Primary (Reporting) Cp: 115  Set: 1 Car: 2  Ref: yes  Event:   9923
Missing P:  Keep: 1  Phase: 0x7d10  Strength: 31
Secondary Sector Information:
Slot 1:   Keep: 1   offset: 391   Strength: 27   Ref: no
Slot 2:   Keep: 1   offset: 325   Strength: 38   Ref: no
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Here is what my incorrect output looks like:

------------------------------
Cp:113   - Set:2  - Car:1
Phase:0x2fdf   - Strength:24
------------------------------
------------------------------
Cp:115   - Set:1  - Car:2
Phase:0x7d10   - Strength:31
Keep:1  Phase: 0x7d10  Strength: 31
Secondary Sector Information:
Slot 1:   Keep: 1    - offset:391    - Strength:27
Keep:1    - offset:325    - Strength:38
------------------------------
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And it should look like this

------------------------------
Cp:113   - Set:2  - Car:1
Phase:0x2fdf   - Strength:24
------------------------------
------------------------------
Cp:115   - Set:1  - Car:2
Phase:0x7d10   - Strength:31
Keep:1  Phase: 0x7d10  Strength: 31
Keep:1    - Pn_offset:391    - Strength:27
Keep:1    - Pn_offset:325    - Strength:38
------------------------------
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