Shostakovich’s Fourth Symphony had hardly entered rehearsals when the political climate turned against the composer and made his having the piece performed impossible. (Source of this sentence: Shostakovich’s Fourth Symphony).
made his having the piece... I hoped him fits here. However, an expert named Tommy Wallach had said his, not him, fits here. He also explained the reason. But I cannot understand at all what he said. The sentence I have mentioned above belongs to a very old post which was posted about 11 years ago. Leaving any comment on that post may not bring any kind of help for me.
Actually I cannot understand the meaning of his having the piece performed impossible. If I could understand its meaning or if I could figure out the way by which each word is connected to each other, probably I could understand why "his" must be used instead of "him" to make this sentence correct.