Morten,
Please use this link for the list of all fixes/fixacks for RBD. This includes a tab for the "zSeries PTF List" which is the list of PTFs for the Rational COBOL Runtime for zSeries.
http://www-01.ibm.com/support/docview.wss?uid=swg27024554
when you look at the list, you should just apply all of them. While there are "fixpack" numbers beside each PTF, this is just when we tested them. The fixes apply to any level of RBD.
Note that UK92032 is REQUIRED once you are trying execute COBOL generated with 8.0.1.5, 8.5.1.1, or 9.0. There was a change in the generated COBOL to call out to new runtime modules (ELACOMB - batch/IMS, ELACOMC - CICS) and this PTF supplies the new modules.
Note2... this change was also made in the COBOL that targets the IBM i. The new runtime module used there is named VGNCOIB and is supplied with the QEGL that is shipped each release/fixpack within the RBD plugins. See the doc on how to upload and restore QEGL.
markevans