SCFLicense: Extension Licensing on Sketchucation

[Noddi17]

Hello,

I'm experiencing an issue when trying to validate the license for the RoundCorner plugin in SketchUp.

Each time I try to activate the license, I receive the following error:

"Error in the License Validation
Request to Sketchucation: ERROR_A04
Wrong Signature File - You may have changed the computer name
It is advised to erase the Signature file and revalidate"

To resolve this, I have already tried the following:

• Deleted the signature file from the SCFlicensing folder
• Changed my computer name to English and restarted
• Reinstalled SketchUp
• Made sure my internet connection is stable

Despite all these attempts, I still receive the same error, and the plugin does not activate.

Could you please help me fix this issue?
Thank you in advance for your support.

[Rich O Brien]

Please run the Window > Libfredo Settings > Fredo6 Plugins Information for Sketchucation Support menu command in SketchUp and copy/paste the output into your reply.

[TIG]

Please note that Fredo's 'RoundCorner' is a different extension to 'FredoCorner'.
They have their own licenses.
You cannot license one of them with a license file that is for the other one...

[Arq Lindoro]

@unterluggauer said in SCFLicense: Extension Licensing on Sketchucation:

Hi Fredo, I upgrade to 4.0.0. The aktiveprocedure was a little different. OK, over again, I bought a full License. I got a new scflicense. But it doesn´t work again. My computer was always connencted to internet and I´m a skechtuo pro.
I pay yesterday 8,61 EUR and today 16,24 EUR without succses. Im a little bit frustrated. Usually i love your extensions

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[TIG]

@fredo6 might be able to comment more helpfully on that error code, but one thing springs to mind - to communicate with SketchUcation.com your firewall settings should 'whitelist' the site - otherwise the licensing falls at the first hurdle...

[Gábor]

@unterluggauer Have you recently changed your computer name? If yes, there are 2 possible solutions:

1. Change it back to the previous one or
2. Erase your signature file at C:\Users\username\AppData\Local\SCF Licenses\SCFLicenseSignature - DO NOT MODIFY OR DELETE.txt

[Mesak4719]

It appears error_a04

[Gábor]

@Mesak4719 Have you recently changed your computer name? If yes, there are 2 possible solutions:

Change it back to the previous one or
Erase your signature file at C:\Users\username\AppData\Local\SCF Licenses\SCFLicenseSignature - DO NOT MODIFY OR DELETE.txt

[TIG]

And if you erase that file you will need to re-validate the licenses...

[jeromec]

Ok, things changed, do we get to be refund the paypal donation made, or deducted from the licence buying then ?

[Rich O Brien]

Donations are direct to developers PayPal. You’d need to ask whoever it is you sent a donation to.

[sd091688]

Hi,
I recently installed round corner but when I use it it appears as per photo attached mentioned trial period expired. Asking to get license.

Hope anyone can help to make it work cause I need it urgently.

TYIA

[fredo6]

What happens if you click on Manage License and revalidate the license?

[Rich O Brien]

@sd091688 did you click manage license?

[LEADERFIT3D]

@Rich-O-Brien
Bonjour, voici un exemple

Et ce que vous m'avez demandé me semble t'il :
Fredo6 Plugins Information on 2025-10-15 12:44:23 +0200

• Platform: x64-mswin64_140 - Ruby: 2.7.7
• Sketchup: 23.1.340
• LibFredo6: v15.2a
• LibFredo6 Binary loaded
• Sketchucation ExtensionStore: 4.4.1
• SCFLicense: v6.4a - 74
• Fredo6 Plugins

  Curviloft v2.0a
  Curvizard v2.5a
  FredoScale v3.6a
  FredoTools v4.5c
  RoundCorner v3.4a
  ToolsOnSurface v2.6a
  TopoShaper v2.7a
  VisuHole v1.5a

• SCFLicense directory present

  Signature File: 2025-06-04 13:40:49 +0200

[Rich O Brien]

@LEADERFIT3D

You have a few items to update

• Librfredo is now 15.5a: https://sketchucation.com/pluginstore?pln=LibFredo6
• Sketchucation Tools is now 5.0.3: https://sketchucation.com/plugin/696-sketchucationtools

Restart SketchUp after updating and try licensing again.

If the error repeats it maybe related to your device name. Special character like áéíóú etc are not allowed. Please rename your device to only use alphanumeric characters.

If you have recently reinstalled your OS this can raise errors. If so, please go to C:\Users\SomeName\AppData\Local\SCF Licenses and delete the SCFLicenseSignature - DO NOT MODIFY OR DELETE.txt file.

Restart SketchUp and try again.

[nlipovac]

Hi Fredo,
I work for a school where I teach 3D modeling to interior designers, and they would like to purchase Fredo6Bundle2022Corp30 - A bundle of 8 plugins for activation on 30 devices, but the administrator would like a proforma invoice instead of buying it through the Sketchucation store. Is that doable?

[epitaph]

After using fredoghost in the model, there will be a warning as shown in the figure when the model is opened again. In addition, lord of toolbar cannot be used normally in version 2026, and it will disappear after adding a custom toolbar and restarting.

[Rich O Brien]

This looks more like an issue with Libfredo and FredoGhost than our licensing system.

Maybe ping Fredo on his FredoGhost thread