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Queries number of available bytes in output.

Component Version macOS Windows Server FileMaker Cloud FileMaker iOS SDK
Shell 7.5 Yes Yes Yes Yes No

MBS( "Shell.AvailableBytesOutput"; ShellRef )


Parameter Description Example value
ShellRef The reference number from the shell. $shell


Returns number or error.


Queries number of available bytes in output.
This allows you to check whether the child process wrote data in the output stream.

See also

Shell.AvailableBytesError   -   Shell.ClearArguments

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