Abu Ahmad ibn 'Adi al-Jurjani: The amount he narrates does not have a Munkar Matn (rejected text), but rather his chains of narration are criticized
Ahmad ibn Shu'ayb an-Nasa'i: He is not trustworthy
Amr ibn Ali al-Fallas: Weak in Hadith
Muhammad ibn al-Muthanna: I have not heard Yahya nor 'Abdur-Rahman narrating from him
Yahya ibn Ma'in: Weak in Hadith, he is insignificant