Using named pipe to communicate between flow graphs


I’m trying to pass IQ data stream from one flow graph to another.
Following is the description of the flow graphs-
FlowGraph 1 - Sender
Signal Source (samp-10M;freq-8M) TO 1.file sink(to named pipe)
2.GUI FFT sink
3.GUI Scope sink

FlowGraph 2 - Receive
File Source(from named pipe) TO 1.GUI FFT sink
2.GUI Scope sink
channel.bin is the named pipe I created with mkfifo command.

The IQ stream is not being received at the receiver consistently.
It works out correctly few times…However, sometimes, the sender OR
receiver OR both SCOPE windows might not show the scope display.
Thing to note is, GUI FFT in both sender and receiver works fine every

What might be the reason ??

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