Unfortunately, maintenance and service for the the z/OS distribution and accompanying z software are not provided for RD&T or RDzUT. The z/OS distribution is provided as-is. If your mainframe team has access to download PTFs, they should be able to order the PTF.
Please note that this forum is a group of volunteers interested in the use and promotion of RD&T, but it is not an official support channel. Advice and configuration assistance is provided by generous volunteers from both inside IBM and outside IBM, but we are unable to provide official support such as providing fixes, opening PMRs and the like.
Doug
SystemAdmin