[SAC-HELP] using sac in shell in 64-bit linux

[xsun at uiuc.edu]

If I use the executable sac (not compiled by my own), then when I use ,like
sac <<end
input
end

sac just stop there and do nothing, is this also sth related to 32-bit/64-bit? because the sac we got is generally compiled in 32-bit machine?

thanks for any help.

xinlei