DOCUMENT:Q174809 17-JUL-2001 [visualc] TITLE :FIX: Developer Studio Crashes Randomly When Navigating Workspace PRODUCT :Microsoft C Compiler PROD/VER:winnt:5.0 OPER/SYS: KEYWORDS:kbVC500bug kbVisID100bug kbVisID600fix kbVJ110bug kbVS97bug kbVS600fix kbVS97sp3fix kbG ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Visual C++, 32-bit Enterprise Edition, version 5.0 - Microsoft Visual C++, 32-bit Professional Edition, version 5.0 - Microsoft Visual J++, version 1.1 - Microsoft Visual InterDev, version 1.0 - Microsoft Visual Studio 97 ------------------------------------------------------------------------------- SYMPTOMS ======== Developer Studio crashes randomly while navigating in the Workspace's FileView or ClassView window and trying to activate different operations with right-mouse click, dragging objects, etc. The crash may also occur when using "Open Workspace" from the File menu to open a makefile. The crash is accompanied by an access violation dialog box. When debugged, the access violation usually points to the IsAlpha() function. CAUSE ===== The cause of this access violation was due to uninitialized and invalid pointers. STATUS ====== Microsoft has confirmed this to be a bug in the Microsoft products listed at the beginning of this article. This bug has been fixed in Visual Studio 97 Service Pack 3. For more information, please see the following article in the Microsoft Knowledge Base: Q170365 INFO: Visual Studio 97 Service Packs - What, Where, and Why Additional query words: Visual C++ visualc J++ Interdev ====================================================================== Keywords : kbVC500bug kbVisID100bug kbVisID600fix kbVJ110bug kbVS97bug kbVS600fix kbVS97sp3fix kbGrpDSTools Technology : kbVCsearch kbVSsearch kbVJsearch kbVisIDsearch kbAudDeveloper kbVC500 kbVC32bitSearch kbVisID100 kbVJ110 kbVS97 kbVS97Search kbVC500Search Version : winnt:5.0 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 2001.