BWA2 command error

Question

[waik]

I commanded

$BWA2 mem -t 1 -R "@RG\tID:sample\tSM:sample\tPL:platform" ../resource/reference/hg38.chr21.fa sample_1.fastq.gz sample_2.fastq.gz > sample.mapped.sam

but there was error

bash: mem: command not found

I tried to find solutions. but no clues.

[Arup Ghosh]

Make sure the $BWA2 bash variable is set with echo $BWA2.

[Pierre Lindenbaum]

and use simple quotes for option -R , otherwise, tabs will be expanded in the SAM header which can break some programs.