Error Using Makeblastdb

Hi there,

I am trying to run makebastdb to create a new BLAST database. The program starts but cuts out abruptly with an Error:

Error: ncbi::s_FixBioseqDeltas() - Bioseq must have Seq-data or Delta containing only literals.

The input should be good. They are correctly formatted fasta files I pulled from Entrez.

The complete output is pasted below. I would appreciate any help or insight anyone can offer. Thank you!

$ makeblastdb -in Herpesviridae.fna -dbtype nucl -out Herpesviridae.db
Building a new DB, current time: 09/20/2012 14:15:59
New DB name:   Herpesviridae.db
New DB title:  Herpesviridae.fna
Sequence type: Nucleotide
Keep Linkouts: T
Keep MBits: T
Maximum file size: 1000000000B

volume: Herpesviridae.db

file: Herpesviridae.db.nin
file: Herpesviridae.db.nhr
file: Herpesviridae.db.nsq

Error: NCBI C++ Exception:
    "/am/ncbiapdata/release/blast/src/2.2.27/IntelMAC-universal/c++/GCC401-ReleaseMT--IntelMAC-universal/../src/objtools/blast/seqdb_writer/build_db.cpp", line 407: Error: ncbi::s_FixBioseqDeltas() - Bioseq must have Seq-data or Delta containing only literals.

Walters-MacBook-Pro:NCBI Data walternmoss$