You must specify the file to write data to!
export_sql.pl 1.35
export_sql.pl -D db -b batch_id -a type -f file -o tsv|xls [-m type -c] [-F filter=value ...] [-L lim] [-d] [-h]
    D: database to export from.
    b: batch ID of the dataset to export.
    a: type of data to export, either 'geno' or 'haplo', for genotypes or observed haplotypes.
    f: file to output data.
    o: type of data to export: 'tsv' or 'xls'.
    d: output depths of alleles instead of the allele values (must use 'haplo' data type).
    m: map type. If genotypes are to be exported, specify the map type.
    c: include manual corrections if exporting genotypes.
  Filters that are applied to select among the catalog loci:
      F: one or more filters in the format name=value.
         Supported filters: 
          cata, alle_l, alle_u, snps_l, snps_u, pare_l, pare_u, prog, vprog, mark, 
        est, pe, blast, gcnt, chisq_l, chisq_u, lnl_l, lnl_u, ref, loc

  Filters to be applied to individual sets of haplotype calls (for those selected catalog loci):
      A: specify an minimum allele depth limit.
      L: specify a minimum locus depth limit.
      I: specify a minimum locus log likelihood limit.
    h: display this help message.