Hello every one,

It's about a month that I stuck with picard. Every command that I try to run with picard failed.
And for all of them I get the same error: 

> ERROR: Invalid argument '-I' , '-O'

When I try this argument I=  or  R=

I get this: 

    

> NOTE: Picard's command line syntax is changing.
> 
>  ** For more information, please see: **
> https://github.com/broadinstitute/picard/wiki/Command-Line-Syntax-Transition-For-Users-(Pre-Transition)
> 
> ** The command line looks like this in the new syntax:
> ** MergeVcfs -I sample1.vcf -I sample2.vcf.vcf -O Output.vcf.gz


can anyone tell me if I am doing sth wrong or it's a bug in picard?

I really appreciate any help!

works on my machine using https://github.com/broadinstitute/picard/releases/download/2.18.20/picard.jar


    java -jar /path/to/picard.jar MergeVcfs I=/path/to/S1.vcf.gz I=/path/to/S1.vcf.gz O=/path/to/out.vcf.gz
    (...)
    [Sun Dec 16 14:57:17 CET 2018] picard.vcf.MergeVcfs done. Elapsed time: 0.01 minutes.
    Runtime.totalMemory()=40632320


yes there is the message `  NOTE: Picard's command line syntax is changing.` but that's just an information.