🚀 go-pugleaf

I am using Mathematica via the MathLink protocol in an IB palette,
and I found the following strange interaction between the event loop
and the MathLink functions: If I call the MLStart() function in
-appDidInit: or anywhere after [NXApp run] is called, it will work
(sort of) but the first call to MLNewPacket() will hang forever. If
I move the MLStart() call into the main() function and call it before
[NXApp run] everything will work. But of course this is not possible
in an IB palette (at least if you want it to work in test mode), so
I would like to know what the cause could be for this sort of failure.
I think MLStart does not much more than popen() does, i.e. open a pipe,
fork, and exec. MLNewPacket() does a select() to check if the pipe is
still there, then a read(). What does [NXApp run] do that might cause
this to fail?

I am also using the Sybase DB library in the same palette, if that matters.

I am pretty sure that my MathLink code is correct because I basically
copied WRI's sample front end program.

I am doing this under 2.1/2.2; I haven't tried it under 3.0 yet.

Thanks in advance for any pointers!

	Rainer
--
Rainer Staringer                   | rainer@fml.tuwien.ac.at
Financial Markets Lab, TU Vienna   | +43 (1) 58801/8138