I had the same problem and reached a very good eConcierge technical support person in early December 2015. He sent the following instructions...
If you see that particular Java error message displayed while installing the Supplies Assistant:
I followed the instructions and had a working SuppliesAssistant until the next day when I updated from Mac OS X El Capitan 10.11.1 to El Capitan 10.11.2 whereupon I began receiving the message that SuppliesAssistant could not be opened.
I normally log in as a normal user so I checked the permissions and found them set to:
I changed the permissions for the SuppliesAssistant folder and its contents to:
system - Read & Write
which, according to eConcierge technical support, are the proper settings.
Even after the change, I still received the message that SuppliesAssistant could not be opened. Restarting, reinstalling, and restarting did not fix the problem so I copied the entire SuppliesAssistant folder from Macintosh HD:Applications:SuppliesAssistant and pasted it into another folder named Xerox thinking I'd look at it again later when I had more time. Being nothing if not stubborn, I tried launching SuppliesAssistant one last time from inside Macintosh HD:Applications:Xerox:SuppliesAssistant:SuppliesAssistantClient
It worked! And it's worked ever since. Can't explain it., but I hope it keeps working.
So, I spoke with Xerox and it appears that the error message is poorly worded. You need Java 1.7.u75 exactly; not anyother version higher or not.
I installed version Java 1.7.u75 and everything worked as expected.
I am having the same issue with Mac OS 10.10.5. I have the latest version of Java installed: 1.8u60, but when I try to install the Supplies Assistant I get the following error: Unsupported version of Java detected, Please install Java 1.7.u75 version or higher.
I have deleted my java temp files as well, but same thing.
Any help would be appreciated.
Thanks for the reply. I must say that my typo really changes things as I omitted a "10". The version is 10.10.4 so it's current. I already completely wiped away 8 and installed 7 but to no avail. I suppose the next step is Xerox. Thanks though.
I have not run across your particular issue, and have no access to an OS anywhere near as old as 10.4, but I would suggest installing the particular Java version it lists, since it is Java 7 and you have 8 it should just place it inside of 8 and will probably work fine, New versions of Java remove the older but not when done vice versa, so if you have 7, and install 8, 7 will get removed, but if you have 8 and install 7 it will be placed inside of 8. Her eis a screenshot of my PC running Win7, I don't have access to a Mac at the moment, but it works the same way in my experience.
If that does not work your best bet is to call Xerox for help, but I would very much try to reproduce the issue on 10.8 or higher since 10.4 is long past end of life.
I have a strange issue installing an updated version of the Xerox Supplies Assistant on OS X 10.4.4. Even though I have the latest version of Java the Supplies Assistant installer says to install version 1.7.u75 or higher which is well under version 8 update 51; what I have installed now. Does anyone know of any issues with the latest version and Java? We haven't had issues up until this point.