I attached a corrected file, compressed in zip.
On windows: you can easily replace the LP_XML.xsd file in Tool/WIN folder with the corrected one. This should solve the problem.
On mac: the converter is originally in a compressed file, which is unzipped when you first start the “MakeLibrary.pl” script in Sources/ArchiCADLibrary/Make. After that, you can replace the LP_XML.xsd in Tool/OSX/MakeGDLLib_X86/LP_XMLConverter.app/Contents/Resources with the downloaded one.
I hope it helps.
Team Leader, Library Team