DOCUMENT:Q239879 31-JUL-2001 [winnt] TITLE :CoCreateInstance Fails When Constructor String Is Blank PRODUCT :Microsoft Windows NT PROD/VER:WINDOWS: OPER/SYS: KEYWORDS:kbCOMPlus kbOSWin2000 kbDSupport kbCOMPlusAdmin kbSysAdmin ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows 2000 Advanced Server - Microsoft Windows 2000 Server - Microsoft Windows 2000 Professional ------------------------------------------------------------------------------- SYMPTOMS ======== Create a component that implements IObjectConstruct::Construct. Configure the component as a COM+ application and enable the object construction property, but do not provide a constructor string. Attempting to instantiate the COM+ object results in the following error: Error 8004e025 Automation Error COM+ Activation function failed because an initialization function failed. WORKAROUND ========== The workaround for this problem is to enter a dummy string or just spaces in the Constructor String field. MORE INFORMATION ================ Steps to Reproduce Behavior: ---------------------------- - Create a component that derives from IObjectConstruct and implements IObjectConstruct::Construct but does not use a constructor string. - Configure this component in a COM+ Server Application such that object construction is enabled in Component Services but the constructor string is left blank. To do this: 1. On the Start menu, select Programs, and then select Administrative Tools to launch Component Services. 2. Create a new COM+ Server Application under My Computer\COM+ Applications. 3. Install your component in this Application. 4. Right-click on this configured component and select Properties. Click the Activation tab. 5. Select the Enable Object Construction button and leave the Constructor String blank. 6. Try to create this component through a client application. An error message is displayed saying: Error 8004e025 Automation Error COM+ Activation function failed because an initialization function failed. If you just enter a dummy string or spaces for the constructor string, an instance of the object can be created. Additional query words: objectconstruct, complus, win2k, win2000 ====================================================================== Keywords : kbCOMPlus kbOSWin2000 kbDSupport kbCOMPlusAdmin kbSysAdmin Technology : kbwin2000AdvServ kbwin2000AdvServSearch kbwin2000Serv kbwin2000ServSearch kbwin2000Search kbwin2000ProSearch kbwin2000Pro kbWinAdvServSearch Version : WINDOWS: Issue type : kbprb ============================================================================= 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.