you propably had installed filemaker server 11 you need to uninstalll it first
As already said, there is no FM Server 11 at all installed on that machine, but only FM Pro Advanced 12.
Maybe you had in the past and didnt uninstall it properly
Never had any FM Server version in my life, until now.
In this scenario a new machine certainly isn't warranted. What operating system are you using?
Wether FileMaker Server 11 was installed or not 13's installer thinks it is. You should first try running the FileMaker Server 11 uninstaller. I will message you with a link to download FileMaker Server 11.
Thank you very much, James!
And again with a delay of my reply - my apologies.
I use OS X Mavericks.
I will try the link you sent me and report what happend.
(Even if the uninstaller takes my FM 12 Pro Advanced for the FM Server 11 and wipes it out of this universe, in which case my customers are going to wipe me out of this universe. ;-) )
So, cross your fingers for me.
Ciao and thanks again,