Recently test my DOS accounting program with Vista.
Problem when running with old Btrieve.EXE :
It can run smoothly except the program reports e memory free is 38x KB, not enough to call the subprocess.
Problem when runnig with Pervasive SQL 8.x :
The program show error status code 20 (the database engine not install) .
now I got a good news from Pervasive.
http://www.pervasive.com/kb/kb.asp?fx=getdetails&solid=00017909&title=DOS%20application%20returns%20a%20Status%2020%20on%20Windows%20Vista
Solution Details
Solution ID: 00017909
DOS application returns a Status 20 on Windows Vista
Problem Description:
DOS application returns a Status 20.
Problem Environment:
Pervasive PSQL v9
Windows Vista
Cause of this problem:
With Windows Vista, Pervasive Software is no longer able to support applications that require the use of a T.S.R. (Terminate Stay Ready) Requester, this includes such Btrieve Requesters as Brequest, Breqtcp, Breqnt, etc. Windows Vista users can use the Pervasive provided Win32 DOS Box Support, which is a VXD (Virtual eXtended Driver) that comes with Pervasive PSQL v9. This VXD gets loaded as part of the operating system boot-up, however, since Windows Vista limits the location where applications can place files, users are required to perform additional steps to make this program execute.
Solution Notes:
Configuring BTRBOX to work with Windows Vista:
1. Copy the following file (from the \pvsw\bin directory) into the \windows\system32\ directory:
BTRVDD.DLL
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