After Sonata had "disappeared in a mysterious, corporate black hole, somewhere in eastern Canada in 1992,"[5] Jonathan Ingram and colleague Gerard Gartside then went on to develop Reflex, bought for $30 million by Parametric Technology Corporation (PTC) in July 1996.
[5][6] PTC had identified the architecture, engineering and construction market as a target for its parametric modelling solutions, and bought Reflex to expand into the sector.
[9][10] Around the same time, several people from PTC set up a new company, Charles River Software (renamed Revit Technology Corporation in 2000, later (2002) bought by Autodesk).
[7][9] Leonid Raiz and Irwin Jungreis obtained from PTC a non-exclusive, source code development license for Reflex as part of their severance package.
In a 2017 letter to AEC Magazine, Jungreis said: However, Ingram, in his 2020 book Understanding BIM: The Past, Present and Future, shows much of the functionality of Reflex is duplicated in Revit.