[Genome] protein to dna blat / protein to genome blat alignment

[Finney, Richard (NIH/NCI) [E]]

Is there a way to get command line blat to do protein to dna (protein to
genome) sequence alignment? I get the message "d and q must both be
either protein or dna" when running a command like this 

"blat -t=prot =q=dna chr1.fa p.fsa output.psl" 

Normally, I'd take the error message at face value, but I'm a little
stumped
because the hgBlat server does do protein to genome alignment.

I've probably annoyed your sysadmins before by setting up curl/wget
scripts to torture your servers to get this information but would really
like to do
it locally via command line.

Thanks for any thoughts and help on this.