[galaxy-dev] Fwd: GATK fasta file not found ERROR

Dear Developers, I am using GATK for first time. I am doing Targeted reseq Analysis. while i am running Unified Genotyper in Galaxy interface. it gives error message as mentioned below.. "ERROR MESSAGE: The fasta file you specified (/tmp/tmp-gatk-WBrGTf) does not exist." But i places the Fasta file path in .loc file(gatk_sorted_picard_index.loc). Also could anyone tell what are the preprocessing steps before using Bam file for Unified Genotyper?? Your answers are very much Appericiated. Thanks Sridhar