There's no explicity statement in RAW to the effect, no. IMO, if your spell fails, you know why it failed. If the opposite were true, then consider the ramifications. You wear armor and cast a fireball spell at an opponent with SR located in an AMF. If the spell fails, did it fail due to SR, the AMF, or your arcane spell failure chance? Do you find it a little unreasonable that a spellcaster could not tell why? If you agree that the spellcaster should be able to tell why, then the same reasoning applies to scrying.