the MaData6 error that occurs is a cloudy one, it can happen at the most unexpected moments, it is general the communication between the database engine (Pervasive) and MaData6 (Maximizer) getting interrupted by something going on in the background of the operating system.
You could try;
Rename BPWindow folder (in C:\Program files\Maximizer) to BPwindowX (if you are not using Orderdesk) or if Maximizer kind of runs ok, then you can disable it in File>Preferences and then restart Maximizer.
Shut down Virus Checker while using Maximizer (if not possible, then maybe just script blocking?)
Use the minimum amount of programs whilst using Maximizer, because resource issues have been known to also cause General Page Fault errors (MaData6 and Maxwin.exe errors).
Or you could try going to Windows Explorer, Copy and Paste as a Shortcut the file C:\Pvsw\Bin\W3DBSMGR.EXE into your Windows start up folder;
C:\Documents and Settings\All Users\Start Menu\Programs\Startup for Windows 2000 or XP
When it is in your start up folder, Right click it then select properties>Shortcut and where it says Target it should say;
C:\Pvsw\Bin\W3DBSMGR.EXE -SRDE
(You add the -SRDE)
its also a good Idea to install the latest drivers for the system devices, network drivers, e.t.c. As the faster the access to the data the less chance of getting a MaData6.dat error.
Also have you tried the latest Maximizer Service packs?
go to HERE and click the Service Packs link in the top right.
And download and apply the latest to all of your machines.
Regards
CABC Support