I know you are a loooong time user of OSGrid, I've seen you here on the forums and in LBSA. We've talked. You are important because you are one of the members who've chosen to stick with it. Please read the following, with the understanding that I have respect for you as a user, an OSGrid resident, and as someone who gives enough sh!t to complain from time to time.
No one is trolling you. Foxx and Jozee have both offered solid tech support advice.
On Windows, the Opensim log file exist in the same folder as opensim.exe, usually the \bin folder, and the log file is clearly named opensim.log. Is Windows Explorer hiding file extensions from you? Having only used the viewers on Linux, someone else will have to point you to the location of the log file, and what its name is on that platform.
Mantis refers, in this case, to the method of properly logging a bug so that it gets in front of the devs who can actually determine if something is wrong. To file a mantis, follow the link that Jozee posted, and take the time to read the page, follow a few links there, get yourself familiar with Mantis.
If you are unable to login to your regions, but able to login somewhere else on the grid, such as LBSA, the problem is not the grid, as it obviously is working for you to log into.
The problem, then, is one of the following:
1. As you suggested, something with the last update, in which a Mantis is STRONGLY recommended.
2. Something in your local setup.
(any thing from a random Windows update or dependency update on Linux to provider issues);
** Do not discount this. Short of it being a bug in the code, this is the most likely culprit.
3. The vast internet between you and the OSGrid servers. If you can Google, then clearly not this!
It is very important to note here, what version of the opensim software are you actually using? Is it the OSGrid distribution, or the stock Opensim distribution? Are you updating the software daily, as in, using the nightly builds? If so, Foxxe, you need to understand that software development is a process, whereby, instructions are written for the computer to follow, ie, the software source code. Sometimes, in such complex systems as Opensim, bugs are introduced that could invariably cause an issue for a single user, or for many users. This is because, no two computers are exactly the same. Differences in the software and the updates applied to said software, differences in the manufacturing processes that make a component on one computer ever so slightly different on the next one on the production line.
What I'm trying to say is simply this.
There are just too many damned variables to chase!!! People, as a fact of life, as a conscious choice to succeed or fail, are responsible for teaching themselves the tools they are using. Learning is not a one time event, it is a process. It is trial and error, making mistakes, and discovering for ones self, the proper solution to the problem at hand.
(Foxxe, do not take this personally, but I do have to rant, as this thread fits the description below!!!)
As someone who has spent a lifetime fixing other people mistakes, nothing is more irritating than the experience of someone who revels in complaining about some perceived problem, yet does nothing to try to help themselves. Simply listen to the advice of more experienced users and spend more time reading and rereading the documentation that may have actually been created or changed since the last time you looked.
With much love,