createHandout issue

gistfile1.txt

⌘ ~/Dropbox/git-shared/moocs/courses/progfun1/target/patmat (master) sbt
[info] Loading project definition from /Users/hmiller/Dropbox/git-shared/moocs/courses/progfun1/target/patmat/project
[info] Set current project to progfun1-patmat (in build file:/Users/hmiller/Dropbox/git-shared/moocs/courses/progfun1/target/patmat/)
> compile
[info] Compiling 2 Scala sources to /Users/hmiller/Dropbox/git-shared/moocs/courses/progfun1/target/patmat/target/scala-2.11/classes...
[error] /Users/hmiller/Dropbox/git-shared/moocs/courses/progfun1/target/patmat/src/main/scala/patmat/Huffman.scala:117: not found: type ???
[error]     def until(xxx: ???, yyy: ???)(zzz: ???): ??? = ???
[error]                                              ^
[error] /Users/hmiller/Dropbox/git-shared/moocs/courses/progfun1/target/patmat/src/main/scala/patmat/Huffman.scala:117: not found: type ???
[error]     def until(xxx: ???, yyy: ???)(zzz: ???): ??? = ???
[error]                    ^
[error] /Users/hmiller/Dropbox/git-shared/moocs/courses/progfun1/target/patmat/src/main/scala/patmat/Huffman.scala:117: not found: type ???
[error]     def until(xxx: ???, yyy: ???)(zzz: ???): ??? = ???
[error]                              ^
[error] /Users/hmiller/Dropbox/git-shared/moocs/courses/progfun1/target/patmat/src/main/scala/patmat/Huffman.scala:117: not found: type ???
[error]     def until(xxx: ???, yyy: ???)(zzz: ???): ??? = ???
[error]                                        ^
[error] four errors found
[error] (compile:compileIncremental) Compilation failed
[error] Total time: 3 s, completed Feb 22, 2016 7:15:33 PM
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