# \#4x3-errata

**URL:** https://forums.buildingsmart.org/tag/4x3-errata/94.md

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## [Contradiction in the specification of IfcShapeRepresentation](https://forums.buildingsmart.org/t/contradiction-in-the-specification-of-ifcshaperepresentation/3247)

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**Author:** [@giovanniv](https://forums.buildingsmart.org/u/giovanniv)\
**Replies:** 0\
**Last updated:** [January 10, 2021, 8:40pm UTC](https://forums.buildingsmart.org/t/contradiction-in-the-specification-of-ifcshaperepresentation/3247 "2021-01-10T20:40:22Z")

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This issue is present both in version 4.3 RC2 and 2x3 TC1, so I’m guessing all version inbetween are affected too. Both specifications have a table listing the possible values for RepresentationType, in which SolidModel …

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## [IfcAlignment2DVerSegTransition & IfcAlignment2DCantSegTransition](https://forums.buildingsmart.org/t/ifcalignment2dversegtransition-ifcalignment2dcantsegtransition/2621)

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**Author:** [@jonm](https://forums.buildingsmart.org/u/jonm)\
**Replies:** 1\
**Last updated:** [April 17, 2020, 4:16am UTC](https://forums.buildingsmart.org/t/ifcalignment2dversegtransition-ifcalignment2dcantsegtransition/2621 "2020-04-17T04:16:14Z")

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@stefan.markic emailed this: Guys, just a question regarding cant-stuff: Why is there an attribute of type “IfcTransitionCurveSegment2D” on “IfcAlignment2DVerSegTransition" as well as “IfcAlignment2DCantSegTransition"…