I get the error “A newer build of Rhino is already installed. Please uninstall it before installing this edition”
As this is the latest off McNeel’s web site "“rhino_en-us_8.21.25188.17001"” AND I have uninstalled Rhino 9 WIP I cannot see my way around this.
Can someone please help?
My log file is attached :
rhino.msi:-2147023293
C:\Users\phils\AppData\Local\Temp\Rhino_8_20250805123550.log
etc..
Rhino_8_20250805123550.log (74.5 KB)
This is my screen after running (what I thought was) my old version from an existing short-cut, so it didn’t uninstall.
What you have installed is an 8.22 Service Release Candidate. The official download is the 8.21 Service Release. Thus, you do indeed have a later build of Rhino 8 installed. 8.22.25210 is the latest service release candidate, there is no newer one available. You cannot go back to 8.21 without uninstalling Rhino first.
Hi I tried that but it it says successful and it is removed from the Uninstall options. At that point I cannot proceed. Should I re-install the Candidate (which I can’t remember ever installing)? And then uninstall that?
9.0.25210.12305 | 29 July 2025 | 690.0 MB is the only release candidate I can find. Please can you send me a link?
Version 9 is a WIP. That is not the same as a release candidate of Rhino 8. Rhino 9 is a separate install from Rhino 8.
Rhino service releases are “official” versions that happen about once a month, and the download link is posted on the website. Release candidates are released about every week and are not posted publicly, you get them by subscribing to the release candidate cycle via Options > Updates and service releases, in the dropdown menu choose “Service release candidate” instead of “Service Release”.
At some point you might have done the above, which is why you have a SRC installed. What is actually the problem with your Rhino 8 installation?
I can’t uninstall 8.25 release candidate. If I try to install a stable version it says I have a later version installed. I have only installed 9 WIP and don’t know how this happened but the timing was when I updated 9 not 8.
I can wait for an updated release. I have changed my options back - you were right. I just can’t compile using Script Compiler anymore and thought that going back to a previous release might fix that.
