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A
Anonymous
September 7, 2010
Question

MFC100U.DLL

  • September 7, 2010
  • 7 replies
  • 31616 views

Hi, I installed the evaluation package of Lightroom 3.2

I am using Windows 7 x64 pro

1 - I run installer as an administrator

2 - When I start LR 3.2, I received a message : Unable to find c:\windows\system32\mfc100u.dll and LR 3.2 crash.

3 - If I use the windows explorer or the dir command in a cmd shell, I can't find the file in the system32 folder

4 - If I use the SuperFinderXT software, the program find the the file mfc100u.dll in the system32 folder.

Does anybody have an Idea with this ?

    This topic has been closed for replies.

    7 replies

    A
    Anonymous
    September 24, 2015

    Install this: http://www.microsoft.com/en-us/download/details.aspx?id=26999

    Microsoft Visual C++ 2010 Service Pack 1 Redistributable Package.

    issue solved.

    S
    Serge Dubovsky
    Participant
    December 3, 2014

    Install this: http://www.microsoft.com/en-us/download/details.aspx?id=26999

    T
    timlogochair
    Known Participant
    June 20, 2011

    Yes.  Several dll files in the following folder:

    C:\Windows\system32\

    H
    helen_gossweiler
    Inspiring
    June 21, 2011

    timlogochair wrote:

    Yes.  Several dll files in the following folder:

    C:\Windows\system32\

    Thanks, I can imagine that this could cause problems ....

    Beat

    E
    exotericwanderer
    Participant
    June 15, 2011

    Hi , Try this: you need to install a visual C++ redistributable from microsoft. It'

    ll install the required files.  thats all, It should work fine afterwards.

    A
    Anonymous
    June 16, 2011

    I tried the update, but it did not

    make any difference, I still get the error. I will restall the program and let you know what happens.

    Thanks for the help.

    A
    Anonymous
    June 16, 2011

    If the bundled MFC library that comes with Lr, or the official redistributable package does not solve this, it is not Adobe's fault.  The fault lies with the library loader on the OS. This will be clear the moment you try to run any other app that requires the same library at the same version.

    Many shops refer to the problem of finding, maintaining and loading the right version of a library on Windows as "DLL Hell." Welcome to hell.

    You could try running this as a real Administrator, via "Start -> Run...":

    regsvr32 mfc100u.dll

    It will give you a message telling you about success or failure. You might want to note what this message says.

    This should have be done by the various installers already, and the service it calls should do the right thing under the covers that that the library is registered and versioned so user applications can find it.

    The problem is that there are many, many places this can go wrong.  In most cases, it is the windows registry that is at fault -- or you have malware on your computer that is keeping a corrupted copy of the library available. Do not rule out either of these problems.

    I'd start by disabling all real-time anti-virus protection (this can really interfere with the installation of libraries), and checking the registry. Verify you have  sound, malware-free system. I'd end by resinstalling the OS from scratch. Somewhere in-between you might find a solution.

    A
    Anonymous
    May 20, 2011

    Was this problem ever resolved?

    I am having the same problem and Adobe was of no help.

    T
    timlogochair
    Known Participant
    May 23, 2011

    No.  Adobe customer service is an absolute joke (for any support issue I've ever had...and there are many).  No help at all.  I had to use the 32 bit version to get it to work.  If you discover the issue, please help.

    Thanks

    A
    Anonymous
    May 23, 2011

    Thanks for the info...I really think all manufactures could careless about

    the customer once they go out the door. Today it is all about profit.

    Charlie Choc
    Charlie Choc
    Participating Frequently
    September 7, 2010

    Look to see if you have any old lrplugin files. I wouldn't think 64bit LR would need a 32bit dll unless it's for a plugin.

    T
    timlogochair
    Known Participant
    February 16, 2011

    Did anyone find a solution to this problem?  Bought LR 3 and it installed fine.  When I open the program get the same message about mfc100u.dll missing.  We have tried this on several  machines configured as follows:  windows 7 64 bit

    Your help is appreciated.

    Thanks

    H
    helen_gossweiler
    Inspiring
    February 16, 2011

    mfc100u.dll should be installed with LR. If not done so already, try downloading LR 3.3 from the Adobe WebSite and install again.

    Beat Gossweiler

    Switzerland

    dorin_nicolaescu
    dorin_nicolaescu
    Inspiring
    September 7, 2010

    Something might have messed up that dll before Lightroom.

    I have two of them in my Windows folder, one in System32 and one in SysWOW64. perhaps the former is 64-bit and the latter is 32-bit.

    What's the size, timestamp and file version of your System32\MFC100u.dll?

    A
    Anonymous
    September 7, 2010

    Hi,

    Thankx!

    Superfinder report the same size, I manually copy the dll from  SysWOW64 folder to System 32 each time LR report not find the files after three files LR start !

    Best regards!

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