Fasta entry 0 is invalid

[Xacfran]

Hi,

I'm trying to create a database before running a cluster analysis, however I'm getting a "Fasta entry 0 is invalid" error. I have tried creating databases in another fasta files and there's no problem whatsoever.

I'm using:

mmseqs createdb sequence.fasta sequenceDB

The database I'm having issues with contains over 5 millon sequences.

I will greatly appreciate any help!