Union's final production,
Mega Mendoeng, was directed by Boen and released in early 1942. It again starred Soekarno, though this time alongside the new find Sofiati. The company was closed after the
Japanese occupied the Indies in March 1942, and most of its employees never returned to the film industry. Soekarno was an exception; he continued to act until the 1970s, though he was generally credited as Rendra Karno.
Soeara Berbisa was screened as late as February 1949. The film is likely
lost. All movies at the time were shot on flammable
nitrate film, and after a fire destroyed much of
Produksi Film Negara's warehouse in 1952, old films shot on nitrate were deliberately destroyed. As such, American visual anthropologist
Karl G. Heider suggests that all Indonesian films from before 1950 are lost. However, JB Kristanto's
Katalog Film Indonesia (
Indonesian Film Catalogue) records several as having survived at
Sinematek Indonesia's archives, and film historian
Misbach Yusa Biran writes that several Japanese propaganda films have survived at the
Netherlands Government Information Service. ==Explanatory notes==