Hi Folks,
I ran into this error earlier today while attempting to reinstall the WAAE 11.3.6 client on Windows.
This error is thrown by the WAAE installer (InstallShield) while attempting to upgrade or uninstall (e.g. via Add/Remove Programs) the existing installation.
As far as I know, a definitive root cause for this error has never been found.
I have seen cases in the past where a simple reboot of the machine will clear the error. Not today, however.
I was able to successfully clear the error on two separate machines by making an attempt to uninstall CSAM via Add/Remove Programs (appwiz.cpl). In my case this was a separate line item in the installed Programs list. The CSAM uninstall will abort due to the existing dependency from the WAAE client but once the CSAM installer quit the _CaUser error condition was cleared.
Hope this helps someone else.
Mark Hanson
"As I hurtled through space, one thought kept crossing my mind - every part of the rocket was supplied by the lowest bidder." - John Glenn