I think that the semicolon_hack
variable is not set.
You need to write your command like this
select * from C_PROPS
go
or, at the beginning of a sqsh session
\set semicolon_hack=on
go
now you can do
select * from C_PROPS;
or, alternatively, create a .sqshrc in your home directory and insert this snippet
#
# $semicolon_hack : This turns on the ability to use a semicolon as
# a sort of in-line go. It is kind of hacky but seems
# to work pretty well.
#
\set semicolon_hack=on