Here is the code:

use File::Basename;
$infile_name = shift(@ARGV);

if ( ! -r $infile_name)
{
print STDERR "1.Cannot read $infile_name\n";
exit 99;
}
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a few more lines in between and in the main program I have the following:

my $ver_name = shift @ARGV;
my $mon_dir = dirname($infile_name); # Get directory

if (! -z $ver_name) {
(our $graph_dir = $mon_dir) =~ s?log/.*$?abinitio/run?;    #Build dire
+ctory as above if not equal to version.(Replace log/* with abinitio/r
+un)
}
else
{
(our $graph_dir = $mon_dir)=~ s?log/.*$?$ver_name/abinitio/run?; 
#Build directory as such if equal to verion(Replace log/* with $ver_na
+me/abinitio/run)
}
my $graph = "$graph_dir" . "/" . "$graphname";   
# Concatenate graph directory with graphname

if ( ! -r $graph)
{
print STDERR "2. Cannot read graph=$graph\n"
exit 99;
}
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By including the if-then-else condition I am getting the following error that it "Cannot read graph=********(pathname)