I have a client who is using Outlook 2007 Hybrid Pro. The data file is just over 15GB with multiple sub-folders and sub-sub-folders. When he tries to open some of the sub-folders, he gets the error: "Cannot expand the folder. There is not enough free memory to run this program. Quit one or more programs and then try again". Some of the sub-folders will expand and some won't.
I edited the registry expand the shared memory to 0x800000 and the problem persists.
I copied the .pst file to my test machine (running Outlook 2010 Pro and I can expand the folders that will not expand. Does he need to upgrade? Reinstall?