n1qlback example missing path

EXAMPLES
The following will create a file with 3 queries and 5 threads alternating between them. It also creates indexes on the travel-sample bucket

cbc n1ql -U couchbase://192.168.72.101/a_bucket 'CREATE INDEX ix_name ON `travel-sample`(name)'
cbc n1ql -U couchbase://192.168.72.101/a_bucket 'CREATE INDEX ix_country ON `travel-sample`(country)'

cat queries.txt <<EOF

{"statement":"SELECT country FROM `travel-sample` WHERE `travel-sample`.country = \"United States\""} {"statement":"SELECT name FROM `travel-sample` LIMIT 10"} {"statement":"SELECT country, COUNT(country) FROM `travel-sample` GROUP BY country"}

EOF

cbc-n1qlback -U couchbase://192.168.72.101/a_bucket -t 5

I guess you intended to change the last line to be:
cbc-n1qlback -U couchbase://192.168.72.101/a_bucket -t 5 -f path_to_queries.txt