diff --git a/eb/DigitalBarcodeReadgroups-0.1.2-goolf-1.7.20-Perl-5.20.2-bare.eb b/eb/DigitalBarcodeReadgroups-0.1.2-goolf-1.7.20-Perl-5.20.2-bare.eb
new file mode 100644
index 0000000..20d4a23
--- /dev/null
+++ b/eb/DigitalBarcodeReadgroups-0.1.2-goolf-1.7.20-Perl-5.20.2-bare.eb
@@ -0,0 +1,36 @@
+easyblock = 'Tarball'
+
+name = 'DigitalBarcodeReadgroups'
+version = '0.1.2'
+
+homepage = 'https://github.com/mmterpstra/%s' % (name)
+description = """Misc tools"""
+
+toolchain = {'name': 'goolf', 'version': '1.7.20'}
+
+source_urls = [('https://github.com/mmterpstra/%s/archive/' % (name) )]
+sources = [ '%s.tar.gz' % version ]
+
+perl = 'Perl'
+perlver = '5.20.2'
+perlversuffix = '-bare'
+versionsuffix = '-%s-%s%s' % (perl, perlver, perlversuffix)
+
+samtools='SAMtools'
+samtoolsver='1.2'
+
+dependencies = [
+    (perl, perlver, perlversuffix),
+    (samtools, samtoolsver),
+]
+
+#
+# Check if all binaries are present.
+#
+
+sanity_check_paths = {
+    'files': [ 'src/NugeneDigitalSplitter.pl', 'src/NugeneMergeFastqFiles.pl' ],
+    'dirs': [ 'src/' ],
+}
+
+moduleclass = 'bio'
diff --git a/src/NugeneMergeFastqFiles.pl b/src/NugeneMergeFastqFiles.pl
index 5284ac7..0bd999d 100644
--- a/src/NugeneMergeFastqFiles.pl
+++ b/src/NugeneMergeFastqFiles.pl
@@ -44,7 +44,7 @@ sub main {
 	
 	
 	#if reading record fails from both fq files then end
-	while( ((((defined($ARGV[3]) && ! -e $ARGV[3] )|| (my $fq2 = ReadFastq(\$fastq2Handle) ))) && (my $fq1 = ReadFastq(\$fastq1Handle))) && (my $rfq = ReadFastq(\$randomBcHandle)) ){
+	while( ((((not(defined($ARGV[3])))|| (my $fq2 = ReadFastq(\$fastq2Handle) ))) && (my $fq1 = ReadFastq(\$fastq1Handle))) && (my $rfq = ReadFastq(\$randomBcHandle)) ){
 		
 		warn $.if $. =~ /00000$/;
 		my $rbc = $rfq->[1];