Strange !?
The version of the RandomAccessFile library shipped with B4A 6.50 is version is 2.30, not 2.20.
Version 2.30 has the SendAllAndClose method included.
Where does your library come from.
Do you have RandomAccessFile files in the Additional Libraries folder?
The internal libraries folder has higher priority. However it is possible that you have an old version left in the internal libraries folder. It can happen if you copied it in the past.
Best way is to uninstall B4A, delete all internal libraries and reinstall it.
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