I continue to get this error each time I try to install xcode:
"Xcode failed to download, use the purchases page to try again"

This is with the newest OSX 10.10.3.

I found this thread:
http://apple.stackexchange.com/questions/61646/xcode-failed-to-download-use-the-purchases-page-to-try-again

I tried the two possible solutions:
1) Resetting the App Store app via "Debug --> Reset Application" does nothing as far as I can tell (there's no visual feedback that selecting that option does anything).
2) I tried to find the plist file in /private/var/folders/, but the directory there is empty.

I've tried deleting xcode, reinstalling, etc, etc.  I found this crash report via system log which...seems bad...seg fault?:

    Process:               softwareupdated [711]
    Path:                  /System/Library/CoreServices/Software Update.app/Contents/Resources/softwareupdated
    Identifier:            softwareupdated
    Version:               744.10
    Code Type:             X86-64 (Native)
    Parent Process:        launchd [1]
    Responsible:           softwareupdated [711]
    User ID:               200
    
    Date/Time:             2015-04-10 10:00:00.603 -0700
    OS Version:            Mac OS X 10.10.3 (14D131)
    Report Version:        11
    Anonymous UUID:        <redacted>
    
    Sleep/Wake UUID:       <redacted>
    
    Time Awake Since Boot: 7300 seconds
    Time Since Wake:       980 seconds
    
    Crashed Thread:        11  Dispatch queue: com.apple.SoftwareUpdate.SUCatalogDataManager.Handler
    
    Exception Type:        EXC_BAD_ACCESS (SIGSEGV)
    Exception Codes:       KERN_INVALID_ADDRESS at 0x000000012f939380
    
    VM Regions Near 0x12f939380:
        MALLOC_LARGE           000000010c43f000-000000010d293000 [ 14.3M] rw-/rwx SM=PRV  
    --> 
        JS JIT generated code  00003bb82f600000-00003bb82f601000 [    4K] ---/rwx SM=NUL