vcf_operations.cpp:525 Sample names are not unique

[xuefenfei712]

Dear Hannes

I am using Graphtyper to call SNPs, it is quite convinent, while I got the error below

vcf_operations.cpp:525 Sample names are not unique. The output VCF file will contain duplicated sample names (which is against the VCF specs).

I double checked mu header of bamfiles, they are unique, could you tell me how to deal with it? because later I cannot merge them together because of this issue.

Thankyou

xue