Unity crushes while running dll functions(log+code)

http://rghost.ru/79NkzRx7p - here is log file

 using UnityEngine; 
 using System.Collections; 
 using System; 
 using System.Runtime.InteropServices; 
 public class Grapher2 : MonoBehaviour {      
     [DllImport ("1" )]      
     private static extern void Create_polygon( int aa,int log_, int N_x, int N_y, double N_t);     
     [DllImport ("1" )]      
     private static extern void Get_partition ();     
     [DllImport ("1" )]
   private static extern double Get_length();
   [DllImport ("1" )]
   private static extern double Get_height ();
  [DllImport ("1" )]
   private static extern int Get_x ();
  [DllImport ("1" )]
   private static extern int Get_y ();
  [DllImport ("1" )]
   private unsafe static extern void Solve(double time_start,int NT,double * Temp);
  [DllImport ("1" )]
   private static extern double Get_Temp_By_ij( int i,  int j);
  [DllImport ("1" )]
   private static extern double Get_Temp_By_xy( double x,  double y);

//some more code here//

     void Update () { 
     if (currentResolutionx != resolutionx ||currentResolutiony != resolutiony || points == null) { 
         CreatePoints(); 
     } 

     if (Input.GetButton("Fire1")) {
         Vector2 mouse =  Camera.main.ScreenToWorldPoint(Input.mousePosition);
         if(mouse.x<=Graph.x+1 && mouse.x>=Graph.x && mouse.y>=Graph.y && mouse.y<=Graph.y+1) {
             scannedpoint = mouse;
             Point.transform.position = scannedpoint;
             Graph2.GetComponent<Grapher1>().scannedpoint = scannedpoint;
             SPP.GetComponent<SPP>().x = ((scannedpoint.x)*xk).ToString();
             SPP.GetComponent<SPP>().y = ((scannedpoint.y)*yk).ToString();
                 }
             }
     if (ExperiementOn) { 
         unsafe {
             fixed(double* qwe = &(TT[0])){
                 Debug.Log("Fu 3");
                     time_start += SMALL_TIME_STEP * Time_steps;
                     Solve (time_start,Time_steps,qwe);
                     Debug.Log("DD 4"); 
                     Debug.Log("DD 5");
                     CLOCK.GetComponent<Timer> ().delta = SMALL_TIME_STEP * Time_steps;
                     for (int i = 0; i < points.Length; i++) { 
                         float Temp = (float)((double)(*(qwe+i*8)));
                         if (Temp > 0) points [i].color = RGBfromTemp (Temp);  
                         points [i].color = new Color(1f,1f,0f);
                         points [i].size = size;
                                                         }    
                                         }
                 }
                     particleSystem.SetParticles (points, points.Length); 
             }
 }

I use unity3d in order to make a visualization for a computer experiement, which is written in C++. So i wrapped it into dll file and tried it. Some functions worked fine, some did not. The probable issue might be the following: i allocate memory for an array of doubles in c# code, then pass the pointer to c++ dll function and then try to read from it. Can't see anything wrong with it, but if i erase the part of the code responsible for that, it does not crash.