expect_out buffer no such variable running script background


 
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Old 10-01-2010
expect_out buffer no such variable running script background

I am trying to use send and receive using expect. the expect_out(buffer) is working fine while it is running it as foreground. But the same script when it is ran as background, the expect_out(buffer) errored out.

Is there any factor influence when we run script in foreground and in background?

Please through some lights on this.

sample part of script

<..>
send "RTRV-COND-ALL:::P;";
expect ">"
set out $expect_out(buffer)
puts $out
<..>

---------- Post updated 10-01-10 at 11:04 AM ---------- Previous update was 09-30-10 at 11:37 PM ----------

Issue got fixed. The expect_out(buffer) is working fine while running in background...

It was an environmental issue.
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SETSBUF(3PVM)							  PVM Version 3.4						     SETSBUF(3PVM)

NAME
pvm_setsbuf - Switches the active send buffer. SYNOPSIS
C int oldbuf = pvm_setsbuf( int bufid ) Fortran call pvmfsetsbuf( bufid, oldbuf ) PARAMETERS
bufid Integer the message buffer identifier for the new active send buffer. A value of 0 indicates the default receive buffer. oldbuf Integer returning the message buffer identifier for the previous active send buffer. DESCRIPTION
The routine pvm_setsbuf switches the active send buffer to bufid and saves the previous active send buffer oldbuf. If bufid is set to 0 then the present active send buffer is saved and no active send buffer exists. The routine is required when managing multiple message buffers. For example switching back and forth between two buffers. One buffer could be used to send information to a graphical interface while a second buffer could be used send data to other tasks in the application. EXAMPLES
C: sbuf1 = pvm_setsbuf( sbuf2 ); Fortran: CALL PVMFSETSBUF( NEWBUF, OLDBUF ) ERRORS
These error conditions can be returned by pvm_setsbuf PvmBadParam giving an invalid bufid. PvmNoSuchBuf switching to a non-existent message buffer. SEE ALSO
pvm_setrbuf(3PVM) 30 August, 1993 SETSBUF(3PVM)