Windows 7 Professional: VB6 COM call to Fax freezes calling software RRS feed

  • Question

  • The fax executable is called from a proprietary 3rd party software application.    The platform used is VB6 and the fax executable is called by COM with a Word document as a parameter.  When the application goes to fax the word document(s), the application freezes and Windows 7 asks for a continue/find the issue. The desktop is Windows 7 Professional 32 bit with the user having administrator privleges local machine and domain. 

    History of the issue is that on faxing consultation letters the Administrator executable stops.  Event viewer logs have been examined and the following has been found.
    1. Event viewer had errors pertaining to ntdll.dll.  Administrator was the crashed application.
    2. The application-specific permission settings do not grant Local Launch permission for the COM Server application with CLSID {C97FCC79-E628-407D-AE68-A06AD6D8B4D1}
     and APPID
     to the user NT AUTHORITY\SYSTEM SID (S-1-5-18) from address LocalHost (Using LRPC). This security permission can be modified using the Component Services administrative tool.
    3. Associated device presence class is the associated CLSID number.  The appid is associated with IPBusEnum.dll
    4. http://www.win7dll.info/ipbusenum_dll.html
    The dll is searchable and is in windows\system32.  This dll seems to be Vista/Windows 7 specific.
    http://www.bleepingcomputer.com/startups/ipbusenum.dll-25880.html - more info on the dll
    While the faxsvcc.exe program works outside of IO without issue, it's within IO that the issue occurs.  After examining the event viewer messages it appears that this is a permission issue with the IPBusEnum.dll.


    Tuesday, November 16, 2010 12:12 PM

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