Announcing ColdFusion updates released Nov 14 2023 - security update
If you apply the update using the CF Admin and then find that CF starts but the Admin and your code fail, I cover that also, in the second section below.
For more, read on.
If you apply the update using the CF Admin and then find that CF starts but the Admin and your code fail, I cover that also, in the second section below.
For more, read on.
One explanation and solution for when applying CF updates uninstalls new packages unexpectedly
Announcing ColdFusion updates released Dec 9 2025 - p1 security update and more
Reminder that CF2021 is end-of-life as of Monday Nov 10 2025
Announcing Java updates of Oct 21, 2025 for 8, 11, 17, 21, and 25 - thoughts and resources
Announcing ColdFusion updates released Sep 9 2025 - p1 security update
When and how to upgrade CF web server connector, easier in recent CF releases
wei said:
Thank you for your detailed and clear explanation, which solved many problems
One explanation and solution for when applying CF updates uninstalls new packages unexpectedly
Charlie Arehart said:
Branden, if I could help you solve whatever is amiss, would you be open to having a half hour engage
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One explanation and solution for when applying CF updates uninstalls new packages unexpectedly
Branden P de Buhr said:
On my work / corp laptop, I run my dev environment. Which was running previously on cf 2023 u
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Announcing ColdFusion updates released Dec 9 2025 - p1 security update and more
Charlie Arehart said:
Tim, any thoughts on what I'd shared? Did you confirm things work as I proposed? Did
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Announcing ColdFusion updates released Dec 9 2025 - p1 security update and more
Charlie Arehart said:
Tim, that's incorrect.
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CAN use that JVM arg with CF2025 and it IS honore
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| Sun | Mon | Tue | Wed | Thu | Fri | Sat |
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| 1 | 2 | 3 | 4 | |||
| 5 | 6 | 7 | 8 | 9 | 10 | 11 |
| 12 | 13 | 14 | 15 | 16 | 17 | 18 |
| 19 | 20 | 21 | 22 | 23 | 24 | 25 |
| 26 | 27 | 28 | 29 | 30 |


The log says:
Installation: Unsuccessful.
145 Successes
2 Warnings
2 NonFatalErrors
2 FatalErrors
Action Notes:
Failed to copy hotfix files:C:\Users\Administrator\250372.tmp\dist\updates: Failed to copy the hotfix files to the target location. Retry installation after ensuring that the server is not running or files are not locked by the server.
Failed to copy hotfix files:C:\Users\Administrator\250372.tmp\dist\wwwroot: Failed to copy the hotfix files to the target location. Retry installation after ensuring that the server is not running or files are not locked by the server.
I have tried to uninstall using CMD and it says invalid or corrupt JAR file for the uninstaller.jar
I have reinstalled the update, several times, manually stopped all Coldfusion services before doing it and it's still stuck in this state.
I'm out of ideas of where to go from here - any help would be much appreciated.
Perhaps you presumed it does not apply to you, but it sounds like it may (and I may rename that section to stand out better to folks who may misconstrue its importance).
I have now managed to install updated 5 with the extra argument and it went through ok. However, I now have a new problem that I can see in FusionReactor which is that it says 'java.lang.NoSuchFieldError: preserveCase'.
I can open the Administrator but Coldfusion is failing to process any application.cfc on my server because of it but I don't have any code that references preserveCase. I don't know if that's a Java problem or a corrupted Coldfusion file problem.
I'd start with clearing the cfclasses folder, if you know what that means. And I'd recommend you stop cf, rename that folder, then start cf. Not only will create the new cfclasses folder for you, but you'll have it for possible postmortem assessment--whether of this or other issues.
I wish Adobe support was as reactive and helpful.
Thanks again.
And you can help others here (since that seems a new problem): what cf update had you been on before update 6?
@S Daugherty, thanks for your kind regards here. Sorry I missed that back in November.