Your long regex 

    s/^(.*\|)*.*ABC\.pi=([\d.]+|[\w.]+)*.*ABC\.id=(\d+|[\w.]+).*$/$1$2
+|$3/s;

[download]
can be futher reduced to match your required output.
Using the solution provided by kenosis like so: 
use strict;
use warnings;

while (<DATA>) {

   next unless /^\d+\|(\d+?)\|/ and $1 == 1;

        if (/(.+?)~.+?=(.+?)~.+=(.+?)$/) {  # note here
            print $1, $2, $3, $/;
        }
        else {
            print "Exception: ", $_, $/;
        }
}

__DATA__
123|1|456464|645646|4546|654~abc~dhghga~ABC.pi=112.33.44.55.66~ABC.id=
+789137136770
123|1|456464|645646|4546|654~abc~dhghga~ABC.pi=112.33.44.55.67~ABC.id=
+789134713670
123|1|456464|645646|4546|654~abc~dhghga~ABC.pi=112.33.44.55.68~ABC.id=
+789137213670
123|1|456464|645646|4546|654~abc~dhghga~ABC.pi=112.33.44.55.69~ABC.id=
+78913713670
123|1|456464|645646|4546|654~abc~dhghga~12.33.44.55.70~3713670
123|1|456464|645646|4546|654~abc~dhghga~ABC.pi=112.33.44.55.70~ABC.id=
+78913713670
123|1|456464|645646|4546|654~abc~dhghga~ABC.pi=112.33.44.55.70~ABC.id=
+78913713670
123|1|456464|645646|4546|654~abc~dhghga~ABC.pi=112.33.44.55.70~ABC.id=
+789137135670
123|1|456464|645646|4546|654~abc~dhghga~ABC.pi=112.33.44.55.70~ABC.id=
+789137153670
123|1|456464|645646|4546|654~abc~dhghga~12.33.44.55.70~3713670
123|1|456464|645646|4546|654~abc~dhghga~121322~456466874~8796896
123|2|456464|645646|4546|654~abc~dhghga~121322~456466874~6788708
123|2|456464|645646|4546|654~abc~dhghga~121322~456466874~6806

[download]
Output:
123|1|456464|645646|4546|654112.33.44.55.66789137136770
123|1|456464|645646|4546|654112.33.44.55.67789134713670
123|1|456464|645646|4546|654112.33.44.55.68789137213670
123|1|456464|645646|4546|654112.33.44.55.6978913713670
Exception: 123|1|456464|645646|4546|654~abc~dhghga~12.33.44.55.70~3713
+670

123|1|456464|645646|4546|654112.33.44.55.7078913713670
123|1|456464|645646|4546|654112.33.44.55.7078913713670
123|1|456464|645646|4546|654112.33.44.55.70789137135670
123|1|456464|645646|4546|654112.33.44.55.70789137153670
Exception: 123|1|456464|645646|4546|654~abc~dhghga~12.33.44.55.70~3713
+670

Exception: 123|1|456464|645646|4546|654~abc~dhghga~121322~456466874~87
+96896

[download]

If you tell me, I'll forget.
If you show me, I'll remember.
if you involve me, I'll understand.
--- Author unknown to me

In reply to Re: Print only if pattern matches by 2teez
in thread Print only if pattern matches by brad_nov

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