We have two separate applications that both need to run at the same time on the same workstation. Each application uses a different version of the Borland Database Engine (BDE). The two BDE versions are incompatible. Does anyone know how to configure a system to allow both BDE versions to run simultaneously?
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How to run 2 versions of BDE on one computer
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The application using the older BDE isn't ours. We don't have the source code. So we cannot recompile it.
Even if we did have the source code, it was developed in Turbo C++ (predecessor to C++ Builder)... not Delphi.
Just to give you an idea of how old this app is, it doesn't even use Microsoft Foundation Classes. It uses Borland's OWL for all Windows API calls.
So in order to bring this application up to date, you'd have to migrate it to MFC first. Yuck!
Even if we did have the source code, it was developed in Turbo C++ (predecessor to C++ Builder)... not Delphi.
Just to give you an idea of how old this app is, it doesn't even use Microsoft Foundation Classes. It uses Borland's OWL for all Windows API calls.
So in order to bring this application up to date, you'd have to migrate it to MFC first. Yuck!
I don't know if this will help, but I have 2 versions of the BDE installed and if I start up the older one first, (older one is for a program that I don't have source for) then start up Delphi 5, D5 uses the older dlls and everything seems to work ok. If I start D5 (newer BDE) first it won't work.
Good luck! TealWren
Good luck! TealWren
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This implies that you are running two BDE versions that are compatible. For example, they are both 5.x or later.
Delphi 5 shipped with BDE 5.x. This version of the BDE was heavily documented by Borland to NOT be backward compatible. In fact, migrating our source code from D3 to D5 would have been pretty simple, except for some changes we had to make for BDE 5.x compatibility.
Is the older one BDE 4.51 (aka 4.5.1.4) or older?
The version is in the properties of the idapi32.dll.
If there is a solution for this, it probably involves renaming one of the idapi32.dll files. Because once one version is loaded, all other applications attempting to use it will use the one loaded in memory first. It's the classic caveat of using DLLs.
Delphi 5 shipped with BDE 5.x. This version of the BDE was heavily documented by Borland to NOT be backward compatible. In fact, migrating our source code from D3 to D5 would have been pretty simple, except for some changes we had to make for BDE 5.x compatibility.
Is the older one BDE 4.51 (aka 4.5.1.4) or older?
The version is in the properties of the idapi32.dll.
If there is a solution for this, it probably involves renaming one of the idapi32.dll files. Because once one version is loaded, all other applications attempting to use it will use the one loaded in memory first. It's the classic caveat of using DLLs.
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Actually, it is a 32-bit app. They normally use BDE 3.50, but we have been able to run it on the more recent 4.5.1.4. This problem just cropped up after we migrated our product to Delphi 5, in which the BDE isn't backward compatible.
How do you run something in its own memory space??? I mean, aside from what Windows normally does?
BTW: we can mandate they use Windows 2000 if necessary.
How do you run something in its own memory space??? I mean, aside from what Windows normally does?
BTW: we can mandate they use Windows 2000 if necessary.
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