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UDF Posting Value Twice in File

Hello everyone,

As said in the title, my UDF is currently outputting the data I want twice into a data file, and I only want it to post it once. For example it would look something like this:

Time RPM
0 0
0 0
1 1
1 1

I looked around on different forums, and it seems my problem might be because I need to Parallelize my UDF? I'm a newbie when it comes to writing UDF so I'm confused on the whole Parallelization issue. If anyone knows anything about my output problem, I'd very much appreciate the help.

Code:

#include "udf.h"



FILE *fp;    /* local pointer fp to FILE */



DEFINE_ZONE_MOTION(fmotion,omega,axis,origin,velocity,time,dtime)

{

 time = CURRENT_TIME;

 if (time < 0.1)

 {

 *omega = 2500.0 * time;

 }

 else

 {

 *omega = 250.0;

 }

 N3V_D (velocity,=,0.0,0.0,0.0);

 N3V_S(origin,=,0.0); /* default values, line could be omitted */

 N3V_D(axis,=,0.0,1.0,0.0); /* default values, line could be omitted */

 fp = fopen("data.txt","a+"); 

 fprintf(fp,"Time: %f RPM: %f\n",time,*omega); 

 fclose(fp);     /* close the file pointed to by fp */

 return;

}

try this, compile code

Code:

#include "udf.h"



FILE *fp;    /* local pointer fp to FILE */



DEFINE_ZONE_MOTION(fmotion,omega,axis,origin,velocity,time,dtime)

{

 time = CURRENT_TIME;

 if (time < 0.1)

 {

 *omega = 2500.0 * time;

 }

 else

 {

 *omega = 250.0;

 }

 N3V_D (velocity,=,0.0,0.0,0.0);

 N3V_S(origin,=,0.0); /* default values, line could be omitted */

 N3V_D(axis,=,0.0,1.0,0.0); /* default values, line could be omitted */

 #if RP_HOST

 fp = fopen("data.txt","a+"); 

 fprintf(fp,"Time: %f RPM: %f\n",time,*omega); 

 fclose(fp);     /* close the file pointed to by fp */

 #endif

 return;

}