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Editorial Team
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Asked: 2026-06-05T05:13:00+00:00

The NotesUserActivity class appears to have a memory leak. When I collect the user

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The NotesUserActivity class appears to have a memory leak. When I collect the user activity information from multiple databases and call the GetNthUserActivityEntry method, the memory usage increases with every call.

I found a few references to this issue, but no solution. I think the issue is related to this call: 

' Load the User name for the Activity Structure
UsernameOffset = puActivity + puActivityEntry.UserNameOffset
spUsername = Space(MAXUSERNAME)
Call CopyMemoryString(spUsername, UsernameOffset,Lenb(spUsername))
sUserName = Left(spUsername, Instr(spUsername, Chr(0)) - 1)
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1 Answer

  1. Editorial Team

    The username is fetched from the memory by reading MAXUSERNAME bytes (256). The username is usually not 256 bytes long, so I think the function accesses memory that it should not access.

    I changed code to:

    Call CopyMemoryString(spUsername, UsernameOffset, strlenLP(UsernameOffset))
Dim sUsername As String
sUserName = Trim(spUsername)

    The strlenLP() method reads the memory until it reaches a \0. The declaration is: 

    Declare Private Function lstrlenLP Lib "kernel32" Alias "lstrlenA" (ByVal lpString As Long) As Long
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