[Glass] Jade - Method List Browser - changing a method source throws exception

[itlists at schrievkrom.de]

If I have a method list browser and I want to change the source code of
the selected method I always get an error:

JadeServer>>compileMethod: methodString behavior: aBehavior user:
aUserProfileOrNil inCategory: categoryString

throws an error (Message not understood) at the statement

...
errorList do: [:each |
...

but error list in my cases refers always to the target class of the
method changed.

-- 
Marten Feldtmann