[GRASS-user] ps.resamp.rst: invalid argument

[Rich Shepard]

While waiting to learn the uses of the various r.resamp* modules, I tried
r.resamp.rst with this result:
r.resamp.rst in=dem2014 ew_res=10 ns_res=10 elevation=base10ft slope=slope10ft aspect=aspect10ft --o
Processing all selected output files will require
129.19 KB of disk space for temp files.
Temporarily changing the region to desired resolution ...
Changing back to the original region ...
Percent complete:
ERROR: Unable to seek: Invalid argument

I'm not seeing the invalid argument. Please show me what I've missed.

TIA,

Rich