This reverts commit 96d393dfb757afc61ffb319c34035d8d2ce7c33d. However, raising an exception if failing the BOM index search is still wanted, so a custom exception is raised instead of returning None.
This reverts commit 96d393dfb757afc61ffb319c34035d8d2ce7c33d. However, raising an exception if failing the BOM index search is still wanted, so a custom exception is raised instead of returning None.