[Sunmax]

Hello，

I have struggled with a UDF problem and I can‘t find same question anywhere.

Here is the thing:

I started running my case it compiled the UDF successfully and ran well.BUT when I load the auto saved case and data to resume calculation things became weird,it can't run at the beginning.

the error is:
Updating solution at time level N...
done.

Updating mesh at time level N... The fl process could not be started.
MPI Application rank 0 exited before MPI_Finalize() with status -1073741819

I used to run the same case well on another PC in fluent 15.0 using serial processing,my present fluent version is 2019R1 with same configurations.
I have tested other cases without UDF and they can resume calculation naturally.

Things like the old UDF isn't compatible new version of fluent.I put my UDF down below omiting the code detials:

#include<stdio.h>
#include"udf.h"
#include"math.h"
#define  PI 3.1415926
DEFINE_GRID_MOTION(up1,domain,dt,time,dtime)
{
Thread *tf=DT_THREAD(dt); 
face_t f;
Node *v;
int M=10000,N=8092,i,j,I0,n;
double L0 = 0.2, x[10002], y[10002], dx[10001], dy[10001], ds[10001], L[10001], xxxup, yyyup, xup[10001], yup[10001], a = 0.05, t = 0.16, wl = 0.08,

xx1[] = {},
h1[] = {};

begin_f_loop(f,tf)   

{  

	f_node_loop(f,tf,n)
	{ 
		
		if( n==0)
		{
			v=F_NODE(f,tf,n);
			F_UDMI(f,tf,0)=NODE_Y(v);

		}
	

	}

}
end_f_loop(f,tf);

if(time<=t)
{

}

begin_f_loop(f,tf)   
   
{  
	
    f_node_loop(f,tf,n)
    { 
	  v=F_NODE(f,tf,n);
      if( NODE_POS_NEED_UPDATE(v))
      {
      NODE_POS_UPDATED(v);

	  NODE_X(v)=xup[i];
	  NODE_Y(v)=yup[i];
      }


   }
 
}
   
end_f_loop(f,tf);

}


}

Dose anyone know how to fix that?

[AlexanderZ]

delete this and try to run

if(time<=t)
{

}

other option: run on single core

best regards

[Sunmax]

the if code controls the motion so I can't delete this part，and I ran this case on single core as I mentioned