【求助】请高手们来看一段程序的问题。（关于UG内存释放）

关于内存释放的，不知道错误在哪里！请高手们指点。
        double *parm=NULL,*tmp_parm=NULL,parm_oncurve,pnt_oncurve[3],dtol=0.0254;
  int num_int,i;
  UF_EVAL_p_t eval;
  tag_t face;
  uf_list_p_t edge_list;
  UF_MODL_intersect_info_p_t *intersect=NULL;
  
  UF_MODL_ask_face_edges(face,[$edge_list)]
  UF_MODL_ask_list_count(edge_list,[$num_edge)]  
  
  parm=(double *)UF_allocate_memory(sizeof(double *),[$err)]
  for(i=0;i<num_edge;i++)
  {        
    UF_MODL_ask_list_item(edge_list,i,[$edge)]
    UF_CALL(UF_MODL_intersect_objects(edge,curve,dtol,[$num_int,&intersect))]
    if(num_int>0)
    {            
      for(j=0;j<num_int;j++)
      {  
        if(intersect[j]->intersect_type==UF_MODL_INTERSECT_POINT)
        {          
          UF_EVAL_initialize(curve,[$eval)]    
          UF_CALL(UF_EVAL_evaluate_closest_point(eval,
            intersect[j]->intersect.point.coords,[$parm_oncurve,pnt_oncurve))]
          UF_EVAL_free(eval);
                  parm=(double *)UF_allocate_memory(sizeof(double *)*(num+1),
            [$err)]
          memcpy(parm,tmp_parm,sizeof(double)*(num));          
          parm[num]=parm_oncurve;
          if(tmp_parm!=NULL)             
            UF_free(tmp_parm);
          tmp_parm=parm;
          num++;
        }
        else continue;          
        }        
      }      
    }
  
程序调试，当num=1时,此时tmp_parm[0]=0.553，没有问题，当num=2时，此时tmp_parm[0]=0.553，tmp_parm[1]=0.487也没有问题，当num=3时，tmp_parm[0]=0.553，tmp_parm[1]=0.487，tmp_parm[2]=0.315程序运行到UF_free(tmp_parm)时出错，ug显示错误
"Invalid trailer found in storage manage block"  
实在不知道错误在哪里，请高手们指点！！