# [ref_impl_eiffel] [475] Correct error where specialised archetype whose definition is a copy of that of the parent was causing an exception during DIFFERENTIAL_ARCHETYPE.make_from_flat

**Category:** [Reference Implementation: Eiffel (archive)](https://discourse.openehr.org/c/reference-implementation-eiffel-archive/161)
**Created:** 2008-01-27 22:17 UTC
**Views:** 3
**Replies:** 0
**URL:** https://discourse.openehr.org/t/ref-impl-eiffel-475-correct-error-where-specialised-archetype-whose-definition-is-a-copy-of-that-of-the-parent-was-causing-an-exception-during-differential-archetype-make-from-flat/12758

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## Post #1 by @svn1

Revision: 475
Author:   thomas\.beale

Log Message:

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**Canonical:** https://discourse.openehr.org/t/ref-impl-eiffel-475-correct-error-where-specialised-archetype-whose-definition-is-a-copy-of-that-of-the-parent-was-causing-an-exception-during-differential-archetype-make-from-flat/12758
**Original content:** https://discourse.openehr.org/t/ref-impl-eiffel-475-correct-error-where-specialised-archetype-whose-definition-is-a-copy-of-that-of-the-parent-was-causing-an-exception-during-differential-archetype-make-from-flat/12758