Teddy Robinson:
From the translation supplied in a previous post:
" Chairman of KNKT Soerjanto Tjahjono explained that after takeoff, pilot Captain Afwan had asked the air traffic guide to change direction to avoid bad weather
The pilot, he said, then received a traffic guide's instruction to fly at an altitude of 11,000 feet."
(My emphasis) The "traffic guide" apparently means ATC, not TCAS.