Why is DETAIL_PICTURE not being updated in update()?

Question

1C-Bitrix

I'm trying to update the "DETAIL_PICTURE" field of the infoblock element:

$el->update(1123, ['DETAIL_PICTURE' => CFile::getFileArray($pic)]);

1. The "$pic" variable contains the ID of the image
2. The "getFileArray()" method returns the correct array
3. The "update()" method returns "true"
4. The "LAST_ERROR" property is empty
5. There are no handlers for the "elementUpdate" event

Image is not is being updated. If the same code is used to update another field, for example, "NAME", then everything works fine. What can be wrong?

Answer 1

Try the makeFileArray function