好的，我终于找到了什么导致了这个问题如果有人遇到这种情况（从稀缺的答案我猜这不常见，但嘿...）。

Ok, I finally found out what caused this problem. I'll post it here in case anyone else encounters this (from the scarcity of answers I guess it ain't that common, but hey...).

问题是，用于启动可执行文件的路径包含一个由单个点组成的路径元素，如下所示：

The problem was that the path used to launch the executable contained a path element consisting of a single dot, like this:

c:\dir1\.\dir2\program.exe

这显然使VS2005在

which apparently made VS2005 go look for an executable at

c:\dir1\dir1\dir2\program.exe

当然不存在...谢谢马克过程监视器！删除。根据预期再次附加到流程工作。

that of course does not exist... Thank you Mark for Process Monitor! Removing the . made attaching to the process work as expected again.