I am using a VC++ DLL to upload files from a client to a server using WinInet API calls, using apparently the same procedure as the original poster of this thread. Occasionally and mysteriously I will get Error code 12032 on HttpEndRequest. I have researched this error code and the standard explanations and "fixes" for it do not apply to my situation. I am using anonymous access on the web site, so the user name and password do not have to be passed to IIS. I have code in place that will attempt to re-upload any file that has an error up to ten times before failing. Even with this in place, I sometimes still getting the error 12032, meaning it failed ten times in a row. Note that this code usually works, but sometimes it fails and I want to know why it is failing.

I received this error this morning, and I found that only rebooting would make it work. Restarting IIS did not help. I would like to know why I had to reboot to make this work. I want to understand what is happening on a low level. Can someone explain this to me?

A few more details:

I am using Windows XP SP2/IIS 5.
In this case, the client and server were on the same PC.

If I have not provided enough detail about the problem, ask me whatever you like.