Dear All,

I run a 6 parallel processes with boost MPI on a system with OpenMPI. 

When the run-time of the program is short, it works well.

But, if the run-time is long, I got errors: 

[n124:45521] *** Process received signal ***

[n124:45521] Signal: Segmentation fault (11)

[n124:45521] Signal code: Address not mapped (1)

[n124:45521] Failing at address: 0x44

[n124:45521] [ 0] /lib64/libpthread.so.0 [0x3c50e0e4c0]

[n124:45521] [ 1] /lib64/libc.so.6(strlen+0x10) [0x3c50278d60]

[n124:45521] [ 2] /lib64/libc.so.6(_IO_vfprintf+0x4479) [0x3c50246b19]

[n124:45521] [ 3] /lib64/libc.so.6(_IO_printf+0x9a) [0x3c5024d3aa]

[n124:45521] [ 4] /home/path/exec [0x40ec9a]

[n124:45521] [ 5] /lib64/libc.so.6(__libc_start_main+0xf4) [0x3c5021d974]

[n124:45521] [ 6] /home/path/exec [0x401139]

[n124:45521] *** End of error message ***

It seems that there may be some problems about memory management. 

But, I cannot find the reason. 

My program needs to write results to some files. 

If I open the files too many without closing them, I may get the above errors. 

But, I have removed the writing files from my program. 

The problem appears again when the program runs longer time. 

Any help is appreciated. 

Jack

July 25  2010