Hi, guys,

when i did the SPCE water model on parallell platform, i got the error: “couldnt creat 3d FFT plan error”. I checked the mannual and didnt find much explanation. Is this mean i didnt install FFT during the Lammps make? How to solve such problem? Thanks a lot!

Bests,

Yanfei(Eric)

Hi, guys,

when i did the SPCE water model on parallell platform, i got the error:

"couldnt creat 3d FFT plan error". I checked the mannual and didnt find much

explanation. Is this mean i didnt install FFT during the Lammps make? How to

if you use a current version of LAMMPS you will *always* have FFT support.

in case you don't compile in an external FFT library, LAMMPS will use an

internal one adapted from the KISS FFT code.

solve such problem? Thanks a lot!

first of all, you have to provide the specifics of how to

reproduce this error. i have never come across it, and

i have done quite a bit of testing with different FFT libraries

way back when i worked on the FFT code in LAMMPS.

so what FFT library are you using on what platform

and what input deck?

axel.

This error should only happen if memory allocation

for various attibutes of how an FFT will be executed

fails, which is pretty unlikely. How big is the FFT you

are invoking, and on how many processors? Which

FFT option/package are you linking against with your

LAMMPS build?

Steve