During his administrative years, he often used to play violin and accompanying Vaziri who played tar in Amir Showkat-ol-Molk’s house. After resigning of Reza Shah and his going to exile (1941), Rokneddin Mokhtari was arrested and went to a trial in 1942. He was condemned to an 8-year period of imprisonment. In 1945 he was remissioned but never was as active as before. By contracting a cancer, in 1971 he died after a surgical operation in Tehran.