FIX: C0000005 Fatal Error Passing FGETS() a String > 256 chars (221747)

The information in this article applies to:

Microsoft Visual FoxPro for Windows 3.0
Microsoft Visual FoxPro for Windows 3.0b
Microsoft Visual FoxPro for Windows 5.0
Microsoft Visual FoxPro for Windows 5.0a
Microsoft Visual FoxPro for Windows 6.0

This article was previously published under Q221747

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 that this is a bug in the Microsoft products that are 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:

194022 INFO: Visual Studio 6.0 Service Packs, What, Where, Why

194295 HOWTO: Tell That Visual Studio 6.0 Service Packs Are Installed

MORE INFORMATION

Steps to Reproduce Behavior

Create a new program file in Visual FoxPro 6.0.

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)

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.

Modification Type:	Major	Last Reviewed:	5/12/2003
Keywords:	kbBug kbCtrl kbfix kbOOP kbVS600SP1fix kbVS600sp2fix kbVS600sp3fix kbXBase KB221747