[mpich-discuss] Problems with multiple calls to MPI_Reduce?

[Rajeev Thakur]

Can you send us a small code fragment?

Rajeev 

> -----Original Message-----
> From: owner-mpich-discuss at mcs.anl.gov 
> [mailto:owner-mpich-discuss at mcs.anl.gov] On Behalf Of Elliot Parkin
> Sent: Friday, June 27, 2008 6:28 AM
> To: mpich-discuss at mcs.anl.gov
> Subject: [mpich-discuss] Problems with multiple calls to MPI_Reduce?
> 
> Hello everyone,
> 
> I've ran into some difficulties using MPI_Reduce. It seems 
> that after  
> it has been called some of the parameters in the code get set to  
> bizarre values. Also, if I call MPI_Reduce consecutively (to fill an  
> array with the maximum values across the processes) it 
> doesn't appear  
> to work the third time and sets all values of the array to zero. Has  
> anybody else had this problem, and if so is there any way to  
> explain/fix this?
> 
> Cheers,
> 
> Elliot Parkin.
> 
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