Microsoft KB Archive/83798

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Paradox 3.5 Will Run Under Microsoft Windows 3.0 and 3.1

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Q83798

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The information in this article applies to:


 * Microsoft Windows versions 3.0, 3.0a, 3.1

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SUMMARY
Borland's Paradox version 3.5 runs in any mode of the Microsoft Windows operating system version 3.0 or 3.1.

The line VCPIWarning=FALSE needs to be inserted in the [386ENH] section of the SYSTEM.INI file. This line prevents the following error message:

ERROR: you have attempted to run a protected mode application in 386 enhanced mode.

Paradox normally runs in real mode or protected mode. When you run Windows 3.0 or 3.1 in standard or 386 enhanced mode, Paradox can only be run in real mode.

PIF Settings
Some default program information file (PIF) settings for Paradox 3.5 may lead to problems in the Microsoft Windows operating system version 3.1. Depending on the circumstances, the -SHARE and -REAL parameters may or may not be desirable. In addition, the KB Required default setting is set too low in the PIF.

The Windows 3.1 PIF for Paradox 3.5 uses the following optional parameters:

  Standard mode: -REAL -SHARE -WIN Enhanced mode: -WIN The -REAL parameter slows down execution and limits the program. It is required for Paradox to run on a network.

The -SHARE parameter allows file sharing. It also requires that SHARE.EXE be loaded. If SHARE.EXE is not loaded, Paradox will fail to load and will state that you do not have access to a required directory. This message may not be visible to you because the PIF is set to close on exit. Paradox will start loading and then return to Windows. To see the message, clear the Close Window On Exit check box in the PIF.

The default KB Required PIF setting for Paradox under Windows 3.1 is set too low. To determine the best setting, experiment with higher settings in relation to the amount of memory available on the system.

64K Contiguous Page Frame Requirement
Paradox uses expanded memory. It requires a 64K contiguous page frame but does not check if a contiguous page frame is available. If expanded memory is available, but the page frame is not 64K contiguous, Paradox will attempt to use expanded memory and it will crash. To work around the problem, do one of the following:


 * Rearrange hardware adapters in the machine to free up a 64K contiguous area in the adapter segment (the area from A000 to EFFF hexadecimal).

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 * Disable expanded memory support in the Paradox PIF. (This applies to enhanced mode only; if you are using real or standard mode, you must disable the external expanded memory manager.)

Running Paradox with Other Applications that Use Expanded Memory
Under Windows 3.0 enhanced mode, expanded memory handles are global. Paradox assumes that no other applications are using expanded memory at the same time. If you want to use expanded memory with Paradox, you must ensure that no other application that also uses expanded memory is run simultaneously. If another program uses expanded memory along with Paradox, Paradox may crash. Paradox installs its own expanded memory manager, even under Windows.

Paradox is manufactured by Borland, vendor independent of Microsoft; we make no warranty, implied or otherwise, regarding this product's performance or reliability.