"unable to map segment" error

[JB dV]

Hi,

I'm a coarray beginner and i'm trying to parallelize an existing Fortran program (Lattice Boltzmann Resolution). When i try to execute the code, specifying a computation over more then 1 image,  i get the following error :
"unable to map segment"
I must say that i'm working on an old station so i've virtualized a multicore CPU thanks to VirtualBox.
So i'd like to know the real meaning of this message and how to fix this issue. I guess this is linked with multicore virtualisation, but in case i'm wrong (and i hope so), i'd be glad for any explanation.

 

Best regards,

 

JB

[JB dV]

Actually, this is not caused by the virtualisation because a simple Hello_world (hello_image) workes fine. Does any one have an idea on what could be the reason of that issue ?

[JB dV]

No idea ???

[jfh]

Post a minimal example that displays this error or we'll be guessing,
perhaps wrongly, what you wrote. I suspect but don't know you used g95
but which version? On what system? (i386? x86_64? Windows? Sun? ...?)
and what messages (if any) it gave at compile time and (if it
compiled without errors but possibly with warnings) also at run time.

I know from bitter experience that it takes work to boil a 300-line
program that appears to exhibit a bug down to a 30-line one (or in
extreme cases a 3-line one) that exhibits the same bug, but it makes
diagnosis of the real problem much easier.

-- jfh