Amitava, It is very difficult for me to take your email seriously. In fact, I just wrote an extremely sarcastic email, then thought better of it. Looking up the web page of the cleaning tool you used, it seems that one of the purposes of that thing is to target third party applications (like Demeter). It promises to remove DLLs that it considers old or unused. If I had to guess, it removed some DLLs from the system space that Demeter was relying on. Given that you reinstalled Demeter and still have the same problem, it seems quite likely that your "helpful" tool did, in fact, remove DLLs from system folders. I have not the foggiest clue how to solve your problem. It is hard enough work for me to maintain a software package in a state that works on virtually everyone's computer. Expecting me to be your system administrator as well seems outside the realm of my responsibilities. B ________________________________ From: ifeffit-bounces@millenia.cars.aps.anl.gov [ifeffit-bounces@millenia.cars.aps.anl.gov] on behalf of Amitava D Roy [reroy@lsu.edu] Sent: Wednesday, May 01, 2013 2:23 PM To: ifeffit@millenia.cars.aps.anl.gov Subject: [Ifeffit] Problem with running Demeter Dear Bruce, I am having this strange problem since I used CC Cleaner to clean up my computer. (This may be coincidental.) [cid:image001.jpg@01CE466F.10C0D470] The following is the output of the dartemis.log file: Can't load 'C:/strawberry/perl/site/lib/auto/Wx/Wx.dll' for module Wx: load_file:The specified procedure could not be found at C:/strawberry/perl/lib/DynaLoader.pm line 200. at C:/strawberry/perl/site/lib/Wx/Perl/SplashFast.pm line 60 Compilation failed in require at C:\strawberry\perl\site\bin\dartemis.bat line 23. BEGIN failed--compilation aborted at C:\strawberry\perl\site\bin\dartemis.bat line 23. I have uninstalled and installed Demeter several times but the problem remains the same. This happened just when I needed to use Demeter the most. Thanks in advance, Amitava Roy J. Bennett Johnston, Sr., Center for Advanced Microstructures and Devices (CAMD) Louisiana State University, Baton Rouge, LA 70806