when I use gatk to identify variants in a bam file converted from gam using vg surject, I get error

[ChenDepp]

@jmarshall when i use (vg surject) convert gam to bam, then use gatk detect variants, it report error as bleow

the genome no chromosome is longer than 512M，i can't solve it by myself, can you give me some suggestion, waiting for your reply!