[FIX] Added the try catch, to avoid an error when one of the vcf's is empty
[FIX] Added the try catch, to avoid an error when one of the vcf's is empty

cbg-ethz/WES_Cancer_Sim,cbg-ethz/WES_Cancer_Sim,cbg-ethz/WES_Cancer_Sim,cbg-ethz/WES_Cancer_Sim,cbg-ethz/WES_Cancer_Sim,cbg-ethz/WES_Cancer_Sim,cbg-ethz/WES_Cancer_Sim,cbg-ethz/WES_Cancer_Sim