[aylalisa]

Dear Foamers,

I'd like to use mapFields sourceCase -parallel.
Both, source and target case, are split in same number of subdomains (2x2x4).

Using mapFields sourceCase -parallel delivers this error:

--> FOAM FATAL ERROR:
bool IPstream::init(int& argc, char**& argv) : attempt to run parallel on 1 processor

From function UPstream::init(int& argc, char**& argv)
in file UPstream.C at line 79.

FOAM aborting

I've tried mapFields sourceCase -parallel -np 8, too. Same error message


Using OF 2.3.0

Could anybody help?

regards,
Aylalisa

[jherb]

How do you start your solver in parallel? Probably you have to use something like

 mpirun -np 8 mapFields sourceCase -parallel

[aylalisa]

Hello Joachim,

I've tried to start mapFields utility as u suggested:

0) define startTime in system/controlDict according to desired time folder from sourceCase
1) blockMesh
2) cp -r 0/ desiredTimeFolder/
3) decomposePar
4) mpirun -np 8 mapFields mySourceCase -parallel >log.mapFields

The last feedback I get:
Creating mesh-to-mesh addressing for region0 and region0 regions using cellVolumeWeight

But then nothing happens, neither a result nor an error message.

If I list the ongoing processor activities with top command I can see that there are no processor activities initiated by mapFields if I start it in parallel . Whereas if I start mapFields with only one processor I can see in the list of CPU intensive tasks that one processor is busy with mapFields.


Aylalisa

[jherb]

If you search these forums, you might find some threads about problems with mapFields in OpenFOAM 2.3. Perhaps you can try with an older version.

[aylalisa]

I haven't yet any better solution. Either that or waiting ...

[olivierG]

hello,

There seem to be some trouble with mapField in the 2.3 version.
So try this (old map method):
mpirun -np 8 mapFields -mapMethod mapNearest -parallel -sourceTime 0 /path/to/source/case/

NB: in this case, both case should be decomposed with 8 processor, and the time to map is 0.
With older mapFields utilities, mapping with different decomposition number where possible (i.e from 4 to 16), but not any more.

regards,
olivier

[aylalisa]

Hello Olivier,

I do following steps in the target case folder:

blockMesh

cp -r 0/ 500/

decomposePar

mpirun -np 8 mapFields -mapMethod mapNearest -parallel -sourceTime latestTime /home/aylalisa/OpenFOAM/aylalisa-2.3.0/run/012_simple_Foam_grading_69x50x20_141

500 is the latestTime folder of the source case.

I get this error:

Creating and mapping fields for time 500

Creating mesh-to-mesh addressing for region0 and region0 regions using mapNearest
*** Error in `mapFields': free(): invalid pointer: 0x0f45454545454545 ***
*** Error in `mapFields': free(): invalid pointer: 0x0f45454545454545 ***
[linux-3tg7:13577] *** Process received signal ***
[linux-3tg7:13577] Signal: Aborted (6)
[linux-3tg7:13577] Signal code:  (-6)
[linux-3tg7:13577] *** End of error message ***
[linux-3tg7:13579] *** Process received signal ***
[linux-3tg7:13579] Signal: Aborted (6)
[linux-3tg7:13579] Signal code:  (-6)
[linux-3tg7:13579] *** End of error message ***
--------------------------------------------------------------------------
mpirun noticed that process rank 2 with PID 13577 on node linux-3tg7 exited on signal 6 (Aborted).

Aylalisa