[Discuss-gnuradio] Limit on file_sources in GRC ?

Ubuntu 12.04 LTS, GNU Radio 3.6.1git-2-g2c7ea132 (on i7).

I have a simple GRC flow with a couple of file sources - these are
FIFOs. I have a separate application which will simulate various antenna
configurations and it attempts to open both of these FIFOs in
O_WRONLY|O_NONBLOCK . As the FIFO's are Write, the other end needs to be
'reading' in order that I don't get "No such device or address". I
accomplish this by starting the GRC flow.The separate application
attempts to open the FIFO's if unsuccessful 10 times.

With either of the source files, only, enabled in GRC, I can get that
FIFO open first time from the application but cannot get them both to open.

Is there a limit on the # of file sources in GRC which is leading to
this behaviour?

Kind Regards,

John

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