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19990923: mailbox error messages


Mike,

I recall replying to this message on about September 1.

Basically, here is what I would guess the problem is:
gsmode.f and gsgprj.f are gplt library routines as well
as appl library routines.

Its likely that the wrong routine is being called due to
an incorrect compile link line.

For a program like gdmap for instance, if you look at
the Makefile in $GEMPAKHOME/src/programs/gd/gdmap/Makefile,
you will see:

$(PROG) : $(ALIB) $(LIBINC) $(PROG.f)
        $(LINK.f) $(PROG.f) $(ALIB) $(LIBINC) -o $@

which will generate:
f77 gdmap.f gdmap.a **LIBINC** -o gdmap

Where libinc is defined in the makefile as:
gemlib.a appl.a syslib.a gemlib.a

Notice that gplt.a is not in there. gplt,a can only be
directly linked in programs such as the GUIs which
eliminate the message queues by using the alternative
ginitp_alt.o and gendp_alt.o routines.

If you indescriminately link the program against gplt.a,
then the routine will bomb when it tries to write
the data from the appl mailbox to the gplt process.
The program will expect to talk to the gplt process across
the mailbox using the message queues- and if you are
linking to the wrong routine, things will be fouled up since the gplt
process will not be able to hook up to the mailbox.

If you still have problems, please send me the link line you are using.

Steve Chiswell
Unidata User SUpport

On Thu, 23 Sep 1999, Mike Trexler wrote:

> Steve,
> 
> The following is a message I sent a couple weeks ago.  I was
> wondering if you had had a chance to come up with any ideas?
> Thanks for your help!
> 
> Mike 
> 
> 
> Mike Trexler wrote:
> > 
> > Steve,
> > 
> > Thanks for the previous help.  Here's my new problem I
> > need your expertise on...
> > 
> > So I've written this program that calls gempak subroutines.
> > I'm getting weird errors, though.  I get the following messages:
> > 
> > Error in message send = 22
> > itype, ichan, nwords,0,0,3
> > 
> > Error in message send = 22
> > itype, ichan, nwords,0,0,12
> >  [GEMPLT -1]  NMBRER - Mailbox read.
> > 
> > Now this is going to get complicated, but these errors come
> > from several layers deep in subroutines like
> > gdcanl.f
> > which calls grmbn.f
> > which calls grsnav.f
> > inside grsnav.f are
> > gsmode.f and gsgprj.f, which generate the above errors.
> > I've checked all the inputs that go into the subroutine
> > calls and they seem reasonable.  I guess what I really am
> > hoping that you do for me is help me understand what these
> > errors mean, in general, rather than a specific solution
> > for my problem.  Could it be that my message queue is disabled?
> > But I would have other problems it that's the case, right?
> > 
> > Thanks for any help you can give!
> > 
> > Mike
> > 
> > --
> > __________________________________________________
> > **************************************************
> > ******          C. Michael Trexler          ******
> > ******      N C State Univ. - Box 8208      ******
> > ******  Dept. of Mar/Earth/Atmos. Sciences  ******
> > ******        Research III   Rm. 100        ******
> > ******        Raleigh, NC 27695-8208        ******
> > ******        (919) 515-1447  Phone         ******
> > ******         (919) 515-1683  Fax          ******
> > **************************************************
> > --------------------------------------------------
> > ******        address@hidden       ******
> > __________________________________________________
> 
> -- 
> __________________________________________________
> **************************************************
> ******          C. Michael Trexler          ******
> ******      N C State Univ. - Box 8208      ****** 
> ******  Dept. of Mar/Earth/Atmos. Sciences  ******
> ******        Research III   Rm. 100        ******
> ******        Raleigh, NC 27695-8208        ****** 
> ******        (919) 515-1447  Phone         ******   
> ******         (919) 515-1683  Fax          ******
> **************************************************
> --------------------------------------------------
> ******        address@hidden       ******
> __________________________________________________
>