Hi, as Tommy has already mentioned, TACT were bought by Helios and Matheson (HMNA) and GENX is one of the IDMS tools still owned by HMNA. While HMNA are still responsible for licensing/renewals etc, the tech support for their IDMS products (including GENX) has always been done by Cogito. So GENX is still supported and still runs under IDMS R19 - just relink with the R19 ADS modules.
Just to confuse matters slightly, Cogito was recently bought by Syncsort - though the Cogito name still lives! If you need more details/help, please feel free to contact me directly at cpetley@syncsort.com
Regards
Clive Petley