```
var roi = ee.FeatureCollection("users/sevki/izmir"),
var img2017= ee.ImageCollection("COPERNICUS/S2_SR")
      .filterDate('2017-1-1', '2018-1-1')
      .filterMetadata('CLOUDY_PIXEL_PERCENTAGE', 'less_than', 5)
      .filterBounds(roi)
      .median()
      .select('B2', 'B3', 'B4', 'B8', 'B11', 'B12')
      .clip(roi)
      .divide(10000);
    print(img2017, 'Image 2017');

```

it worked yesterday but today I got the error message:

> 
> Expected a homogeneous image collection, but an image with
> incompatible bands was encountered:
> 
> 
> First image type: 23 bands (`[B1, B2, B3, B4, B5, B6, B7, B8, B8A, B9, B11, B12, AOT, WVP, SCL, TCI_R, TCI_G, TCI_B, MSK_CLDPRB, MSK_SNWPRB, QA10, QA20, QA60]`).
> 
> 
> Current image type: 21 bands (`[B1, B2, B3, B4, B5, B6, B7, B8, B8A, B9, B11, B12, AOT, WVP, SCL, TCI_R, TCI_G, TCI_B, QA10, QA20, QA60]`).
> 
> 
> Image ID: `20170403T090021_20170403T090840_T35SNC`
> 
> 
> Some bands might require explicit casts.
> 
> 
>