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Q221747: FIX:C0000005 Fatal Error Passing FGETS() a String > 256 chars

Article: Q221747
Product(s): Microsoft FoxPro
Version(s): WINDOWS:3.0,3.0b,5.0,5.0a,6.0
Operating System(s): 
Keyword(s): kbservicepack kbCtrl kbOOP kbvfp300bBUG kbvfp500aBUG kbvfp600 kbvfp600bug kbXBase kbVS6
Last Modified: 20-MAY-1999

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The information in this article applies to:

- Microsoft Visual FoxPro for Windows, versions 3.0, 3.0b, 5.0, 5.0a, 6.0 
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SYMPTOMS
========

Using the FOPEN function to open a file in Unbuffered mode with Read-Only(10) or
Read-Write(12) privileges, and then using the FGETS function to get a line that
has more than 256 characters causes Visual FoxPro to generate the following
error message:

  C0000005 Fatal Error

This can also happen with the FREAD function.

STATUS
======

Microsoft has confirmed this to be a bug in the Microsoft products listed at the
beginning of this article.

This bug was corrected in Visual Studio 6.0 Service Pack 3. For more information
about Visual Studio service packs, please see the following articles in the
Microsoft Knowledge Base:

Q194022 INFO: Visual Studio 6.0 Service Packs, What, Where, Why

Q194295 HOWTO: Tell That Visual Studio 6.0 Service Packs Are Installed

MORE INFORMATION
================

Steps to Reproduce Behavior
---------------------------

1. Create a new program file in Visual FoxPro 6.0.

2. Cut and paste the following code into the program file. Note that the
  StrToFile() function is not available in versions prior to 6.0:

  LOCAL lnFile

  StrToFile(Replicate('0', 300), 'Demo12.dat')

  lnFile = FOpen('Demo12.dat', 10)
  FGets(lnFile, 300)
  FClose(lnFile)

3. Save and run the program.

  Visual FoxPro will cause a C0000005 Fatal Error and terminate.

  In Visual FoxPro with Visual Studio 6.0 SP3, attempting FGETS() on a line that
  has more than 8192 characters generates a "Function argument value, type, or
  count is invalid" error.

Additional query words:

======================================================================
Keywords          : kbservicepack kbCtrl kbOOP kbvfp300bBUG kbvfp500aBUG kbvfp600 kbvfp600bug kbXBase kbVS600sp2fix kbVS600sp3fix kbGrpDSFox kbVS600SP1fix 
Technology        : kbVFPsearch kbAudDeveloper kbVFP300 kbVFP300b kbVFP500 kbVFP600 kbVFP500a
Version           : WINDOWS:3.0,3.0b,5.0,5.0a,6.0
Issue type        : kbbug
Solution Type     : kbfix

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