In rare cases, a module you add to your stylesheet may contain translation units with IDs that are duplicates of ones in your stylesheet. Arbortext Styler will issue a warning that it will have to regenerate the module's translation unit IDs and ask whether you wish to include the module. In most cases you should click Yes when you see this message. However, if you have exported a translation file including translations for that module, and not yet imported the translations, you should click No, and wait until you have imported the translations for the module.