DOCUMENT:Q182249 10-AUG-1999 [foxpro] TITLE :FIX: CHRTRAN(), CHRTRANC(), and FULLPATH() May Cause GPF Errors PRODUCT :Microsoft FoxPro PROD/VER:WINDOWS:5.0,5.0a OPER/SYS: KEYWORDS:kbvfp ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Visual FoxPro for Windows, versions 5.0, 5.0a ------------------------------------------------------------------------------- SYMPTOMS ======== Visual FoxPro 5.0x produces random General Protection Faults or other memory related errors in the development or run-time environment and in Visual FoxPro OLE Automation Servers. Often, these errors are random and difficult, if not impossible, to reproduce consistently. CAUSE ===== In certain circumstances the CHRTRAN(), CHRTRANC(), and FULLPATH() functions are reading past the allocated buffer in memory. RESOLUTION ========== Use another string manipulation function to replace CHRTRAN(), CHRTRANC() or FULLPATH(). Check the Help file topic of each of the three functions and press the "See Also" jump for alternate functions that may be helpful. STATUS ====== Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This has been corrected in Visual FoxPro 6.0. MORE INFORMATION ================ These functions do not produce errors each time they are used. Often, a programmer can rely on these functions to work without causing a problem. The success or failure of these functions depends on how memory is allocated in Visual FoxPro at a given time. Therefore, one application may work fine while another produces memory errors. Since Visual FoxPro's internal memory allocation depends on many factors that the programmer does not control, the problem may appear intermittently. This problem occurs most frequently when Visual FoxPro 5.0x runs on Windows NT 4.0 computers. However, this behavior may also occur on Windows 95 computers. Anytime you experience random memory problems that are difficult to reproduce, remove any occurrences of the FULLPATH(), CHRTRANC(), and CHRTRAN() functions and retest the application. Currently, we do not have a programmatic scenario that reliably reproduces the behavior. If you develop a code example that duplicates this behavior, please contact Microsoft Product Support Services. REFERENCES ========== Visual FoxPro Help; search on: "FULLPATH()"; "CHRTRAN()"; "CHRTRANC()" Additional query words: crash GPF internal consistency error hang kbvfp600fix kbvfp500 ====================================================================== Keywords : kbvfp Technology : kbVFPsearch kbAudDeveloper kbVFP500 kbVFP500a Version : WINDOWS:5.0,5.0a Issue type : kbbug Solution Type : kbfix ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 1999.