難なんがある

expression, godan verb (-ru, irregular)

be a problem; have a flaw; be defective

Used when something has a defect, flaw, or problematic aspect. Often appears in negative contexts or when pointing out an issue.

• この計けい画かくには難なんがある。

  There is a problem with this plan.

• 彼かれの説せつ明めいに難なんがあるとは思おもわない。

  I don't think there is anything wrong with his explanation.