I had the error until I did this workaround for a unix line ending.

I couldn't do a bulk insert directly with just a linefeed. I had to do it through an exec().

create table import_data (line varchar(max));

go

declare @cmd varchar(1000);

set @cmd = 'bulk insert import_data from ''C:\Program Files (x86)\WordNet\2.1\dict\data.verb'' with (ROWTERMINATOR = '''+char(10)+''')';

exec (@cmd);