[gdal-dev] Help: convert WGS84 to SAD69 coordinates + troubleshooting cs2cs

[Hyer, Dr. Edward]

I have this command, which I might have gotten from this list a few
years ago, for how to do this:

cs2cs 
+proj=latlong 
+datum=WGS84 
+to 
+proj=latlong 
+ellps=GRS67 
+towgs84=-57,1.0,-41,0,0,0,0 
+no_defs 
-f "%.5f" 
-w5


Not sure I understand all of that, but anyway, I set it up and test it
and I get 

Rel. 4.6.0, 21 Dec 2007
<cs2cs>: 
Sys errno: 2: <system mess. texts unavail.>

This is on a 64-bit machine running Linux.

What are the steps for troubleshooting this?

Thanks in advance,

--Edward H.