While installing a new Sametime 8.5.2 server, I ran into the following APAR LO71871. Unfortunately, the APAR says it was not reproduced and presumably never fixed. The validate buttons fail in the Installation Manager wizard – again presumably – on IIM 1.5+. You will see an error in the log.
Unhandled event loop exception
I am using IIM 1.6.1 since I have other servers previously installed, and I cannot simply uninstall 1.6.1 unless I also uninstall the other servers (not going to happen). I tried a silent install, which had issues. Attempting to hack the class and plugin was a dead end. The “fix” I settled on was to rename the Installation Manager program folder (C:\IBM\Installation Manager) and the data folder (C:\ProgramData\IBM\Installation Manager), and then install version 1.4.2 that ships with the install media. In the future, I’ll likely need to switch between my 1.6.1 and 1.4.2 IIM installations to install fixes and etc.