Newsgroups: comp.parallel.mpi
From: thyag@scs.carleton.ca (Thanalapati Thyagaraj)
Subject: Output Deciphering
Organization: School of Computer Science, Carleton University, Ottawa, Canada
Date: 8 Nov 1996 00:40:30 GMT
Message-ID: <55tvhu$gqg@bertrand.ccs.carleton.ca>

Hi,

I have just started programming in MPI. Infact, I am using the LAM
version of MPI. I have the following problem:

When using MPI_Isend, and MPI_Irecv, I get the following output.
uL
uL
uL
uL
uL 
uL 
MPI_Isend: invalid rank (rank 20, comm 0)
14096 exited with status 1
15987 exited with status 1
6458 exited with status 1
17488 exited with status 1
12962 exited with status 1
18013 exited with status 1
19950 exited with status 1
14742 exited with status 1
8049 exited with status 1
15992 exited with status 1
14097 exited with status 1
15988 exited with status 1
6459 exited with status 1
17489 exited with status 1
12963 exited with status 1

Two questions!
1. What are the uL messages? 
2. What about the other messages?

Just a brief note about what I am doing in the program. I have
constructed a tree of processes (not using any communiators
other than the default one) and passing messages from one level
to another.

When I checked this code with blocking send and receive, it is 
gives me proper output in place of the uL's though I still get
the exit messages.

I appreciate any suggestions/solutions for my problems. Please
send me your replies to my address as I do not get to read this 
newsgroup very often.

Ah! Thanks in advance for your help.

--tk
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T.K. Thyagaraj			  Tel : Off  - (613) 520-2600 X 8757
Parallel and Distributed 		Home - (613) 235-0297
Systems Group (PARADISE)
School of Computer Science	  Fax : (613) 520-4334
Carleton University			
Ottawa, ON K1S 5B6		  thyag@scs.carleton.ca
CANADA


