[FLASH-USERS] Nei test unit in latest version

[Gao-Yuan Zhang]

Hi all,

I am working on simulations using FLASH code. I found that the Nei test unit counters an error in FLASH 4.4. However, I successfully tested this unit in FLASH 4.2.2 with the same computer system and default settings.

The setup script is “./setup -auto neitest -1d”
All the files are remained default.

The intel fortran 2017 is used to compile and execute. The command line after “make” is
“mpirun -np 8 ./flash4” 
using 8 CPUs.

The error messages are:

	Element I.D.:            9  elsum =  0.99988912740675984
 	error in routine neimn: wrong sum of population fraction
 	DRIVER_ABORT: error in routine neimn: wrong sum of pop. fraction
	application called MPI_Abort(MPI_COMM_WORLD, 1) - process 4
	Fatal error in PMPI_Reduce: Other MPI error, error stack:
	PMPI_Reduce(1270).........: MPI_Reduce(sbuf=0x7fff2e29f610, rbuf=0x7fff2e29f650, count=7, MPI_DOUBLE_PRECISION, MPI_SUM, root=0, MPI_COMM_WORLD) failed
	MPIR_Reduce_impl(1087)....:
	MPIR_Reduce_intra(848)....:
	MPIR_Reduce_impl(1087)....:
	MPIR_Reduce_intra(895)....:
	MPIR_Reduce_binomial(206).: Failure during collective
	MPIR_Reduce_intra(828)....:
	MPIR_Reduce_impl(1087)....:
	MPIR_Reduce_intra(895)....:
	MPIR_Reduce_binomial(144).:
	dequeue_and_set_error(596): Communication error with rank 2

I have tried to change the accuracy in neimn routine to 0.1 rather than the default 1.e-4. The error exist anyway.

This may be a bug in the latest version. I have no idea what’s changed for the 4.4 version. Does any one know what’s happened with the nei unit? As far as I know the update of FLASH code doesn’t change this part.

Best wishes,
Gao-Yuan
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