Error 1000: Unable to match particles crossing processor boundaries

[cgw]

Hi Yao Ling.

I changed the subject of your post because it’s not a solver build error (you built the solver successfully), it is a runtime error. If you scroll up a little bit in the console window (lower right) you’ll see this message:

 From: DESMPI_UNPACK_PARCROSS: 
 Error 1000: Unable to match particles crossing processor boundaries.
   Source Proc:         1 ---> Destination Proc:         0
   Global Particle ID:          272
(PE  0) : A fatal error occurred in des routines

Note that this message should be triggering a popup but it’s not, I think because the “MPI_ABORT” message took precedence. I’ll take a look at fixing that. For now you might have to scroll up a bit to make sure you see all the messages:

Next step is to search the forum for terms like DESMPI_UNPACK_PARCROSS and Unable to match particles, this returns a bunch of results including this helpful reply:

Error from DESMPI_UNPACK_PARCROSS

Two things to check: Are your particles too soft (KN too small)? If you are using an STL file for geometries, is it of good quality? Both of these can result in particles moving too fast causing the MPI pack/unpack routines to fail.