[plt-scheme] Object Debugger release

Did I do something wrong?

> (require (planet "tool.ss" ("plt" "object-debugger.plt")))
unit: exported variable is not defined
setup-plt: Error during Compiling .zos for Object Debugger (/Users/gknauth/Library/PLT Scheme/planet/300/360/cache/plt/object-debugger.plt/1/0)
setup-plt:   unit: exported variable is not defined
. Users/gknauth/Library/PLT Scheme/planet/300/360/cache/plt/object-debugger.plt/1/0/tool.ss:15:14: unit: exported variable is not defined in: drscheme:tool-exports^
> 

-----Original Message-----
>From: Carl Eastlund <cce at ccs.neu.edu>
>
>The new PLT Object Debugger is available for download from PLaneT.
>This tool displays the execution of MzScheme objects graphically.  To
>find out more about this tool:
>
>Web page: http://www.ccs.neu.edu/home/cce/object-debugger/
>PLaneT link: http://planet.plt-scheme.org/#object-debugger.plt
>To install: (require (planet "tool.ss" ("plt" "object-debugger.plt")))