hi :
when I using trang to translate .rnc to xsd using the command :
trang -I ./Request.rnc -O Request.xsd , it's shown the error msg as follows :

fatal: at least two arguments are required
Trang version 20030619
usage: trang [-I rng|rnc|dtd|xml] [-O rng|rnc|dtd|xsd] [-i input-param] [-o
output-param] inputFileOrUri ... outputFile

what's mean about the msg ?

Any help would be really appreciated.

Best regards
jay