Hi sparkleshow, It seems you are trying to place an idml file, please try opening idml file. From the error code you are encountering while opening 2018 indd file, it seems your file got corrupted while working on it, that is why it is not being opened in ID CC 2019. Please send your file to ansjain@adobe.com, and we will see if this file can be recovered. Regards -Anshul
... View more