concatdb doesn't generate db_h files

[ereyred]

Hello! I used MMseqs2 concatdb to concatenate two reference databases (NR and MMETSP) and everything ran fine with Metaeuk (predictexons and reduceredundancy) but when I try to do unitesetstofasta it says the db_h file is not there. I realise when I did concatdb it did not generate a concatdb_h file or a concatdb_h.dbtype or concatdb_h.index. I tried just manually concatenating the two _h files (NR_h and MMETSP_h) and that seems to work but it also asks for the .index file and I don't really know what that contains or how to generate it. Help please? Thank you!!