Hi, You are missing to initialise the Voyage repository. I don’t know how is explained in the Mooc, but you will probably need to do something like:
VOMemoryRepository new enableSingleton. Cheers, Esteban > On 22 Nov 2018, at 17:51, iu136 via Pharo-users <pharo-users@lists.pharo.org> > wrote: > > > From: iu136 <iu...@yahoo.com> > Subject: can't debug TinyBlog in the Pharo MOOC > Date: 22 November 2018 at 17:51:12 CET > To: pharo-users@lists.pharo.org > > > hi guys > I'm following the Pharo MOOC and I'm at Week 4. the other day, I was trying > to implement TinyBlog: Data Persistency using Voyage and Mongo, when I tried > to compile the code, I've got an Error. the title of Error says: > "MessageNotUnderstood: receiver of "save:" is nil", and it refers to > TBMBlog>>writeBlogPost. > > TBMBlog>>writeBlogPost: aTBMPost > posts add: aTBMPost. > aTBMPost save. > self save . > > thanks for your answers! > > > > -- > Sent from: http://forum.world.st/Pharo-Smalltalk-Users-f1310670.html > > >