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Lightroom is making a call the the AGkernel.dll file but the file is unsure what to do because it can't find the line of code within itself to make a response. This can happen for a number of reasons which fall under these two broad categories: AGkernel.dll is damaged and needs to be repaired or AGKernel.dll is the wrong version and needs to be updated to the correct version.
Here are some things you can do to fix the file:
-Reregister AGKernel.dll with Windows: https://support.microsoft.com/en-us/kb/249873
-Repair Windows: https://support.microsoft.com/en-us/kb/929833
-Install all available updates for Windows: Install Windows updates
-Uninstall and reinstall Lightroom
I have the same issue with Lightroom 6. I've tried all the options mentioned above and none of them resolve the issue. I even tried uninstalling Lightroom and re-installing it with administrator privileges.
I ran the sfc /scannow command as administrator and it reported that it found no problems.
My machine is up to date on all Windows patches (its a new re-install of Windows 7 x64). Some 250 patches were installed by Windows Update before I began re-installing software.
When I attempt to re-register the AGKernel.dll file, I get an error message: The module "E:\Program Files\Adobe\Adobe Lightroom\AgKernel.dll" was loaded but the entry-point DllRegisterServer was not found. Make sure that "E:\Program Files\Adobe\Adobe Lightroom\AgKernel.dll" is a valid DLL or OCX file and then try again. I'm out of ideas with what's wrong. Help!