System.IO.IOException: The directory name is invalid.

[ashkansiroos]

Some months ago, I've generated my certificates using letsencrypt-win-simple and everything worked fine However, my certificate will be expired in 10 days and I did not set the auto-renewal, so I tried to regenerate the certificate the same way, but I've got this error:

Requesting Certificate
Request Status: Created
Saving Certificate to C:\Users\Administrator\AppData\Roaming\letsencrypt-win-si
mple\httpsacme-v01.api.letsencrypt.org\mydomain.com-crt.der
System.IO.IOException: The directory name is invalid.

at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
at System.IO.__Error.WinIOError()
at System.IO.Path.InternalGetTempFileName(Boolean checkHost)
at LetsEncrypt.ACME.Simple.Program.GetIssuerCertificate(CertificateRequest ce
rtificate, CertificateProvider cp)
at LetsEncrypt.ACME.Simple.Program.GetCertificate(Target binding)
at LetsEncrypt.ACME.Simple.Program.Auto(Target binding)
at LetsEncrypt.ACME.Simple.Plugin.Auto(Target target)
at LetsEncrypt.ACME.Simple.Program.Main(String[] args)

The folder
C:\Users\Administrator\AppData\Roaming\letsencrypt-win-si
mple\httpsacme-v01.api.letsencrypt.org\

Exists on the server and I could find mydomain.com-crt.der on that.

I tried removing related files in the directory, and running the file again. I've go the same error message, but also I could see that new files has been added to \httpsacme-v01.api.letsencrypt.org\ folder.

[ashkansiroos]

P.S: I have the latest version (v1.9.1) and I am running it on windows server 2012 R2.
Also, I ran it using CMD (Administrator)

[Frogglet]

Hey I had this problem as well, and I was able to solve it after installing new updates and disabling symantec antivirus on the server. Hope that helps.

[cgq355716727]

Hey I had this problem as well

[jclimac]

I'm getting exactly the same error. Using V1.9.3, running as administrator.

Is there any workaround?

Thanks!!

[WouterTinus]

This should be fixed in #496, please report any issues there!