Problem when iterating over chunks inside foreach

I'm getting this error:

System.IndexOutOfRangeException: Index {0} is out of restricted IJobParallelFor range [{1}...{2}] in ReadWriteBuffer.

Code (CSharp):

1.  
2. protected override void OnStartRunning()
3. {
4.         cellsQuery = GetEntityQuery(ComponentType.ReadOnly<BasicCell>());
5.         cellsArray = cellsQuery.ToEntityArray(Allocator.Persistent);
6.         chunks = cellsQuery.CreateArchetypeChunkArray(Allocator.Persistent);
7. }
8.  
9. protected override void OnUpdate()
10. {
11.         float dt = Time.DeltaTime;
12.         NativeArray<Entity> cellsArray = this.cellsArray;
13.         NativeArray<ArchetypeChunk> chunks = this.chunks;
14.  
15.         var translationType = GetComponentTypeHandle<Translation>();
16.         var idType = GetComponentTypeHandle<ID>();
17.  
18.         Entities.
19.         WithReadOnly(translationType).
20.         WithReadOnly(idType).
21.         ForEach((ref PhysicsVelocity curVell, in Translation translation, in ID id, in BasicCell cell) =>
22.         {
23.             float3 attraction = new float3();
24.             BasicCell curCell = cell;
25.  
26.             for (int c = 0; c < chunks.Length; c++)
27.             {
28.                 ArchetypeChunk chunk = chunks[c];
29.                 NativeArray<Translation> translations = chunk.GetNativeArray(translationType);
30.                 NativeArray<ID> ids = chunk.GetNativeArray(idType);
31.  
32.                 for (int i = 0; i < chunk.Count; i++)
33.                 {
34.                     int otherID = ids[i].Value;
35.  
36.                     if (id.Value == otherID) continue;
37.  
38.                     float3 otherPosition = translations[i].Value;
39.  
40.                     float distance = math.distance(translation.Value, otherPosition);
41.                     if (distance < curCell.attractionDistance)
42.                     {
43.                         attraction += math.normalize(otherPosition - translation.Value);
44.                     }
45.                 }
46.  
47.                 translations.Dispose();
48.                 ids.Dispose();
49.             }
50.  
51.             if (attraction.x != 0 || attraction.y != 0 || attraction.z != 0)
52.             {
53.                 curVell.Linear += math.normalize(attraction) * dt * cell.acceleration;
54.             }
55.         }).ScheduleParallel();
56.     }

I think I understand from where the error is coming from but isn't it what chunks were supposed to solve? Am I mistaken on the use of chunks? All the sources that i found on this topic seemed to be using them in that manner.

Anyways I'm trying to iterate over entitys inside a foreach in a SystemBase.OnUpdate method using scheduleParallel (everything works fine with schedule).

Weirdly enougth, yesterday, I was getting the error only twice per play, but today, it appears in every loop. The only change i made was updating from 2021.1.3f to 2021.1.4f but the packages are at the same version, i think.

 

Welp. Immediately after making the post I found the solution: adding a WithReadOnly(chunks). Ops!