Maybe you're reading the data in wrong somehow? The following seems to do what you want, I think. (Not 100% sure if I followed you, but hope this helps.) 
use strict;
use warnings;

my $content = "";
while (<DATA>) {
    $content = $content . $_;
}

print "content: $content"; # sanity check

while ($content =~m/^(CAL.+\((\w+)\))/mg){
        print "\n1= $1";
        print "\n2= $2";
}
__DATA__

CALCON(test1)
{
  TYPE(U8)
  FEATURE(DCOM)
  NAM(stmin)
  LABEL(Min seperation time between CFs)
  MIN(0)
  MAX(127)
  UNITS(ms)  
}

CALCON(test2)
{
  TYPE(U16)
  FEATURE(DCOM)
  NAM(dcomc_sestmr_timeout)
  LABEL(DCOM Session Timer Timeout)
  MIN(0)
  MAX(65535)
  UNITS(ms)
}

[download]
This outputs: 
1= CALCON(test1)
2= test1
1= CALCON(test2)
2= test2

[download]

In reply to Re: nested reg ex over multiple lines by tphyahoo
in thread nested reg ex over multiple lines by eg8rds

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