I don't think anyone will be able to give you the best configuration since there are so many factors that comes into play.
"Type-A" would be related to memory and changing the working set limits could help.
From what I've seen, you will get this error in the events.log when there are other applications on the server competing for memory (SQL server, reloads etc). I would keep the cache at 10% but lower low/high to 50/70 and see if that helps. You can also try to set the QVS service to start "manually" and let other application grab whatever resources they need before QVS is started.
Do you see any warning and errors in the event viewer?
"Type-D" is most likely a bug and you should be able to get the same error in QVS.exe and QV.exe.
Make sure you're running the latest release, 8.50 SR6 (QVS, QVD, Pub & Plugin) and see if that resolves the issue (8.50.6326).
If you still see this issue after the upgrade, please get in touch with QlikView Support.
Thank You Gustav. I'm going to change the limits.
I had the same count of error for Type-A and Type-D, In fact, allways that appear in the event log the "Type-A", after it appear the "Type-B". In another way, in our server is only running the QVS and the OS (windows server 2k3), so the qvs doesn´t have to share the memory with another applications.
Thank you again for the suggestion, I'm going to change the tip's parameters and i'm going to tall how it works on the next week.