A cantata dedicated to his philosophy teacher Franz Samuel Karpe was performed, and he was encouraged by its success.
In 1796 Weigl made extensive business trips for von Braun, to advertise the publishing house.
He published piano arrangements of operas, works of his brother Joseph, and other living Viennese composers, and songs by Franz Schubert: his ops.
[1][4] In 1803, on the death of Franz Xaver Süssmayr, he was appointed assistant conductor at the Court Theatre, where his brother Joseph was chief conductor, but after his last ballet Bacchus und Ariadne was produced in December 1803 he devoted himself entirely to his music publishing business.
In 1826 he transferred the business to his son Peter; the company was dissolved in 1832, and the assets were acquired by Diabelli, Artaria and Maximilian Joseph Leidesdorf [de].