On Fri, 17 Dec 2010, Tjark Weber wrote:

So here's an attempt:

| Sorry, Isabelle cannot establish the requested sublocale relationship
| because the effected chain of interpretations would be too long.
|
| Please try to establish a different sublocale relationship.
| Section 7.1 of the Tutorial to Locales and Locale Interpretation
| provides further information on how to avoid infinite chains of
| interpretations.

This kind of error message would be outdated and misleading in a very short time. We also have an internal collection of jokes about packages that were a bit too chatty, pretending to know what the user needs to do in a certain situation. The principles of modularity, maintainability etc. need to be applied to error messages, too.


        Makarius
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