On 31 July 1934, a military court found him guilty of high treason with Planetta, and sentenced both men to death.

At his trial, Holzweber denied knowing that the coup would result in a small war.

Not meeting the leader of the operation at the Chancellery, I disclosed myself at once to Major Fey.

"[2]Holzweber and Planetta were hanged by the executioner Johann Lang in the Vienna Regional Court the same day.

They were hanged only three hours after their convictions, the minimum wait time required before carrying out a death sentence in Austria.