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

• Microsoft Visual FoxPro for Windows, versions 3.0, 3.0b, 5.0, 5.0a, 6.0

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

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 kbGrpFox kbVS600SP1fix
Version : WINDOWS:3.0,3.0b,5.0,5.0a,6.0
Platform : WINDOWS
Issue type : kbbug