snpEff crashed java.lang.Exception at ca.mcgill.mcb.pcingola.fileIterator.NeedlemanWunsch.(NeedlemanWunsch.java:23)

snpEff crashed on my system, Would you know how I can solve this?
downloaded the GRCh37.64 version of genome but it isn't in the config file (I can only see hg37.63) anyway I tried it with the subdirectory name in ./data/ just to give it a try I think it works
up to the point it crashes .

error msg as below

java -version

java version "1.6.0_26"

Java(TM) SE Runtime Environment (build 1.6.0_26-b03)

Java HotSpot(TM) 64-Bit Server VM (build 20.1-b02, mixed mode)

time java -Xmx6g -jar snpEff.jar -i vcf GRCh37.64 /data/ngsdata/RAWREADS/-exome-hiseq/cleandata/-bwa-hg19/var.flt.vcf > /data/ngsdata/RAWREADS/-exome-hiseq/cleandata/-bwa-hg19/var.flt.vcf.s_snpeff.txt

 NeedlemanWunsch.<init>(22): a.length: 101 b.length: 103

TTCTCTCTCTCTCTCTCTCTCTGTCTCTCTCTCTCTGTCTCTCTCTGTCTCTCTCTCTGTCTCTCTCTCTGTCTCTCTCTCTCTCTCTCTCTCTCTCTCTC

TTCTCTCTCTCTCTCTCTCTCTCTGTCTCTCTCTCTCTGTCTCTCTCTGTCTCTCTCTCTGTCTCTCTCTCTGTCTCTCTCTCTCTCTCTCTCTCTCTCTCTC

java.lang.Exception

at ca.mcgill.mcb.pcingola.fileIterator.NeedlemanWunsch.<init>(NeedlemanWunsch.java:23)

at ca.mcgill.mcb.pcingola.vcf.VcfEntry.createSeqChange(VcfEntry.java:115)

at ca.mcgill.mcb.pcingola.vcf.VcfEntry.seqChanges(VcfEntry.java:372)

at ca.mcgill.mcb.pcingola.snpEffect.commandLine.SnpEffCmdEff.iterateVcf(SnpEffCmdEff.java:205)

at ca.mcgill.mcb.pcingola.snpEffect.commandLine.SnpEffCmdEff.runAnalysis(SnpEffCmdEff.java:547)

at ca.mcgill.mcb.pcingola.snpEffect.commandLine.SnpEffCmdEff.run(SnpEffCmdEff.java:506)

at ca.mcgill.mcb.pcingola.snpEffect.commandLine.SnpEff.run(SnpEff.java:226)

at ca.mcgill.mcb.pcingola.snpEffect.commandLine.SnpEff.main(SnpEff.java:69)

NeedlemanWunsch.<init>(22): a.length: 187 b.length: 184

TCTCCTCCTCCTCCTCCTCCTCCTTCTCCTGCTCCTTCTCCTCCTCCTCCTCCTGCTCCTTCTCCTCCTCCTCCTCCTTCTCCTCCTCCTCCTCCTGCTTCTCCTCCTCCTCCTTCTCCTCCTCCTGCTTCTCCTCCTCCTCCTTCTCCTCCTCCTCCTTCTCCTCCTCCTCCTTCTCCTCCTCCTC

TCTCCTCCTCCTCCTCCTCCTTCTCCTGCTCCTTCTCCTCCTCCTCCTCCTGCTCCTTCTCCTCCTCCTCCTCCTTCTCCTCCTCCTCCTCCTGCTTCTCCTCCTCCTCCTTCTCCTCCTCCTGCTTCTCCTCCTCCTCCTTCTCCTCCTCCTCCTTCTCCTCCTCCTCCTTCTCCTCCTCCTC

java.lang.Exception

at ca.mcgill.mcb.pcingola.fileIterator.NeedlemanWunsch.<init>(NeedlemanWunsch.java:23)

at ca.mcgill.mcb.pcingola.vcf.VcfEntry.createSeqChange(VcfEntry.java:128)

at ca.mcgill.mcb.pcingola.vcf.VcfEntry.seqChanges(VcfEntry.java:372)

at ca.mcgill.mcb.pcingola.snpEffect.commandLine.SnpEffCmdEff.iterateVcf(SnpEffCmdEff.java:205)

at ca.mcgill.mcb.pcingola.snpEffect.commandLine.SnpEffCmdEff.runAnalysis(SnpEffCmdEff.java:547)

at ca.mcgill.mcb.pcingola.snpEffect.commandLine.SnpEffCmdEff.run(SnpEffCmdEff.java:506)

at ca.mcgill.mcb.pcingola.snpEffect.commandLine.SnpEff.run(SnpEff.java:226)

at ca.mcgill.mcb.pcingola.snpEffect.commandLine.SnpEff.main(SnpEff.java:69)

real 1m20.198s

user 1m56.060s

sys 0m3.230s