RealPlayer/RealTimes does not support .fpt file extension. To know more, please visit this article: https://customer.real.com/hc/en-us/articles/204039453
The fpt file extension is associated with variety of xbase applications such as FoxPro, Visual FoxPro, FileMaker Pro, dBase etc. FPT file is used to store database memo data. FPT files don't contain any data stored in main database, memos are only "text notes" about database tables.
If possible, please let us know where you see this file or if it was a downloaded one please include the URL.