tophat建立索引的时候出现报错；
"/share/work/biosoft/tophat/tophat-2.1.1/bin/tophat2" -G Sspon.v20180123.gtf --transcriptome-index=transcriptome_data/known Sspon.HiC_chr_asm
[2019-04-28 05:49:42] Building transcriptome files with TopHat v2.1.1
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[2019-04-28 05:49:42] Checking for Bowtie
Bowtie version: 2.2.7.0
[2019-04-28 05:49:44] Checking for Bowtie index files (genome)..
Found both Bowtie1 and Bowtie2 indexes.
[2019-04-28 05:49:44] Checking for reference FASTA file
[2019-04-28 05:49:44] Building transcriptome data files transcriptome_data/known
[FAILED]
Error: gtf_to_fasta returned an error.
