Meteor 0.9.1: ReferenceError: SimpleSchema is not defined - meteor

Question

After deciding to create a new project and start fresh and then checkout the code for a separate project (that was in a working state) I'm getting the following error with simple-schema. This schema was working so its likely that an update has broken it in some respect.
Can anyone suggest what I need to do to sort this?
Terminal output:
$ meteor
[[[[[ ~/puzzle ]]]]]
=> Started proxy.
=> Started MongoDB.
W20140906-10:30:37.252(-7)? (STDERR)
W20140906-10:30:37.339(-7)? (STDERR) /home/me/.meteor/packages/meteor-tool/.1.0.27.11fuo6h++os.linux.x86_64+web.browser+web.cordova/meteor-tool-os.linux.x86_64/dev_bundle/lib/node_modules/fibers/future.js:173
W20140906-10:30:37.339(-7)? (STDERR) throw(ex);
W20140906-10:30:37.340(-7)? (STDERR) ^
W20140906-10:30:37.340(-7)? (STDERR) ReferenceError: SimpleSchema is not defined
W20140906-10:30:37.341(-7)? (STDERR) at app/lib/schema-Account-Type.js:5:26
W20140906-10:30:37.341(-7)? (STDERR) at app/lib/schema-Account-Type.js:25:3
W20140906-10:30:37.341(-7)? (STDERR) at /home/me/puzzle/.meteor/local/build/programs/server/boot.js:161:10
W20140906-10:30:37.342(-7)? (STDERR) at Array.forEach (native)
W20140906-10:30:37.342(-7)? (STDERR) at Function._.each._.forEach (/home/graeme/.meteor/packages/meteor-tool/.1.0.27.11fuo6h++os.linux.x86_64+web.browser+web.cordova/meteor-tool-os.linux.x86_64/dev_bundle/lib/node_modules/underscore/underscore.js:79:11)
W20140906-10:30:37.342(-7)? (STDERR) at /home/me/puzzle/.meteor/local/build/programs/server/boot.js:82:5
=> Exited with code: 8
Schema:
AccountType = new Meteor.Collection("AccountType");
Schema = {};
Schema.AccountType = new SimpleSchema({
accountType: {
type: String,
allowedValues: ['test', 'live']
},
createdBy: {
type: String,
autoValue: function(){ return this.userId }
}
});
SimpleSchema.debug = true;
AccountType.attachSchema(Schema.AccountType);

Answer 1

I had the same issue. Resolved by the following steps - installing SimpleSchema:
Try installing / reinstalling: aldeed:simple-schema.
Looking at how to install packages: https://guide.meteor.com/using-npm-packages.html
So, I found https://atmospherejs.com/aldeed/simple-schema on Atmosphere to get the correct install script:
meteor add aldeed:simple-schema
(Reference)

Answer 2

Fixed it, ended up having to create a new Meteor app though.
https://github.com/aldeed/meteor-simple-schema/issues/147