./node_modules/.bin/ngc -p src/tsconfig.json --i18nFile=./src/i18n/messages.fr.xtb --locale=fr --i18nFormat=xmb

Error: Unsupported
    at Xmb.load (/MyProject/node_modules/@angular/compiler/bundles/compiler.umd.js:8730:19)
    at Function.TranslationBundle.load (/MyProject/node_modules/@angular/compiler/bundles/compiler.umd.js:9290:64)
    at I18NHtmlParser.parse (/MyProject/node_modules/@angular/compiler/bundles/compiler.umd.js:9470:72)
    at DirectiveNormalizer.normalizeLoadedTemplate (/MyProject/node_modules/@angular/compiler/bundles/compiler.umd.js:13810:72)
    at DirectiveNormalizer.normalizeTemplateSync (/MyProject/node_modules/@angular/compiler/bundles/compiler.umd.js:13790:25)
    at DirectiveNormalizer.normalizeTemplate (/MyProject/node_modules/@angular/compiler/bundles/compiler.umd.js:13767:47)
    at CompileMetadataResolver._loadDirectiveMetadata (/MyProject/node_modules/@angular/compiler/bundles/compiler.umd.js:18074:79)
    at /MyProject/node_modules/@angular/compiler/bundles/compiler.umd.js:18250:58
    at Array.forEach (native)
    at CompileMetadataResolver.loadNgModuleDirectiveAndPipeMetadata (/MyProject/node_modules/@angular/compiler/bundles/compiler.umd.js:18249:45)
Compilation failed