Error Occurred when Activating Accpac Data Source

Problem Details:

When logging onto Sage 300, the following error message appears:

"Error when activating Accpac data source"



This error may be caused by a missing or outdated msxml4.dll file.  Download and install MSXML 4.0 Parser and the SDK from the Microsoft website (Download MSXML 4.0 SP2).  The msxml4.dll and msxml6.dll files may also need to be registered manually.  These files are usually found in the c:\windows\system32 or the c:\windows\sysWOW64 folders.  At a command prompt, use the following command to register the files:

  • regsvr32 c:\windows\system32\msxml4.dll
  • regsvr32 c:\windows\system32\msxml6.dll


  • regsvr32 c:\windows\sysWOW64\msxml4.dll
  • regsvr32 c:\windows\sysWOW64\msxml6.dll



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