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Mario Groleau
Currently Being Moderated

MFC100U.DLL

Sep 7, 2010 9:10 AM

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 ?

 
Replies
  • Currently Being Moderated
    Sep 7, 2010 9:39 AM   in reply to Mario Groleau

    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?

     
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    Sep 7, 2010 1:11 PM   in reply to Mario Groleau

    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.

     
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    Feb 16, 2011 1:38 PM   in reply to Charlie Choc

    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

     
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  • Currently Being Moderated
    Feb 16, 2011 3:50 PM   in reply to timlogochair

    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

     
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    Mar 2, 2011 3:00 PM   in reply to b_gossweiler

    This doesn't work after you restart your computer.  Then you have to install the dll again.  Anyone had success yet?

     
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    Mar 3, 2011 8:29 PM   in reply to timlogochair

    timlogochair wrote:

     

    This doesn't work after you restart your computer.  Then you have to install the dll again.  Anyone had success yet?

    This sounds like the automatic system repair stuff in Windows is backing out the updated library and replacing it with a known "good" one it stashes away for you.

     
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    May 20, 2011 3:46 PM   in reply to Mario Groleau

    Was this problem ever resolved?

     

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

     
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    May 23, 2011 9:45 AM   in reply to ala1717wai

    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

     
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    May 23, 2011 11:44 AM   in reply to timlogochair

    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.

     
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    Jun 15, 2011 3:30 PM   in reply to Mario Groleau

    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.

     
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  • Currently Being Moderated
    Jun 16, 2011 12:04 AM   in reply to exotericwanderer

    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.

     
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  • Currently Being Moderated
    Jun 16, 2011 1:14 PM   in reply to ala1717wai

    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.

     
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  • Currently Being Moderated
    Jun 17, 2011 9:53 AM   in reply to clvrmnky

    Here's an update on my problem with this DLL.  The problem happened for me on Windows 7 Professional 64 bit...and only happened after logging on to a network domain user account.  What I discovered is that our network had "startup scripts" that ran every time a domain user account logged on.  The script was the culprit...as it removed temporary files upon running.  This caused files to be removed and caused the 64 bit version of lightroom to break for me.  I had the IT department disable the scripts, installed the C+ redistributable and restarted.  No problems for me anymore.  Hope this helps someone, if you are on a network computer.

     

    Thansk,

    Tim

     
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    Jun 17, 2011 3:28 PM   in reply to timlogochair

    Thanks for reporting that back, Tim!

     

    Any chance you can tell us which directory being cleared was the problem?

     

    Beat

     
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    Jun 20, 2011 6:03 AM   in reply to Mario Groleau

    Yes.  Several dll files in the following folder:

    C:\Windows\system32\

     
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    Jun 20, 2011 5:32 PM   in reply to timlogochair

    timlogochair wrote:

     

    Yes.  Several dll files in the following folder:

    C:\Windows\system32\

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

     

    Beat

     
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    Jun 21, 2011 8:30 AM   in reply to timlogochair

    As I mentioned much earlier in this thread, if you remove some items from key directories like this, Windows will simply replace them with known "good" versions automatically.

     
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    Aug 21, 2012 3:10 AM   in reply to b_gossweiler

    vill installera mfc100u.dll kan ni tala om hur jag gör

     
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