Off topic:error in json to flatfile.pl prpgram running in jbrowse.

Question

[rajesh]

i am working with JBrowse for genome alignment. When i upload gff3 file and run following command it give error which i am listing here. can anybody suggest me how to deal with that error.

rajesh:~/Desktop/JBrowse-1.12.0$ perl bin/flatfile-to-json.pl --out sample_data/json/try/ --gff sample_data/raw/try/xx.gff3 --key mRNA --type mRNA --trackLabel mRNA --className feature5

error are:

GFF3 parse error: some features reference other features that do not exist in the file (or in the same '###' scope).  A list of them:
 ID                 |           Cannot Find
----------------------------------------------------------------------
ENST00000473466     | Parent=ENSG00000097021