guest1s-MacBook-Pro:test guest1$ node agendaTest.js
Failed to load c++ bson extension, using pure JS version

/Users/guest1/Desktop/sociotal/node_modules/agenda/node_modules/mongoskin/node_modules/mongodb/lib/mongodb/connection/base.js:242
        throw message;
              ^
TypeError: Cannot read property 'concurrency' of undefined
    at runOrRetry (/Users/guest1/Desktop/sociotal/node_modules/agenda/lib/agenda.js:319:23)
    at jobProcessing (/Users/guest1/Desktop/sociotal/node_modules/agenda/lib/agenda.js:315:35)
    at /Users/guest1/Desktop/sociotal/node_modules/agenda/lib/agenda.js:283:9
    at /Users/guest1/Desktop/sociotal/node_modules/agenda/node_modules/mongoskin/node_modules/mongodb/lib/mongodb/collection/core.js:703:14
    at /Users/guest1/Desktop/sociotal/node_modules/agenda/node_modules/mongoskin/node_modules/mongodb/lib/mongodb/db.js:1098:5
    at /Users/guest1/Desktop/sociotal/node_modules/agenda/node_modules/mongoskin/node_modules/mongodb/lib/mongodb/db.js:1806:9
    at Server.Base._callHandler (/Users/guest1/Desktop/sociotal/node_modules/agenda/node_modules/mongoskin/node_modules/mongodb/lib/mongodb/connection/base.js:442:41)
    at /Users/guest1/Desktop/sociotal/node_modules/agenda/node_modules/mongoskin/node_modules/mongodb/lib/mongodb/connection/server.js:485:18
    at MongoReply.parseBody (/Users/guest1/Desktop/sociotal/node_modules/agenda/node_modules/mongoskin/node_modules/mongodb/lib/mongodb/responses/mongo_reply.js:68:5)
    at null.<anonymous> (/Users/guest1/Desktop/sociotal/node_modules/agenda/node_modules/mongoskin/node_modules/mongodb/lib/mongodb/connection/server.js:443:20)