I have same problem my memory_limit is 128M so i dont think it is that
I downloaded it from svn today:
http://svn.modxcms.com/svn/tattoo/tattoo/branches/revolution/
this is my error.log
[2008-10-25 16:38:16] (ERROR @ /workspace/revolution/manager/index.php) Could not load context configuration file: /var/www/workspace/revolution/core/cache/mgr/context.cache.php
[2008-10-25 16:38:16] (ERROR @ /workspace/revolution/manager/index.php) Could not load context: mgr
[2008-10-25 16:38:16] (ERROR @ /workspace/revolution/manager/index.php) Could not find the namespace "" to generate the lexicon cache."
[2008-10-25 16:38:16] (ERROR @ /workspace/revolution/manager/index.php) An error occurred while trying to load and create the cache file for the namespace core with topic: default
i cant get to /manager
my xdebug say:
Warning: modContext::include(/var/www/workspace/revolution/core/cache/mgr/context.cache.php) [modcontext.include]: failed to open stream: No such file or directory in /var/www/workspace/revolution/core/model/modx/modcontext.class.php on line 49
...
Warning: modContext::include() [function.include]: Failed opening ’/var/www/workspace/revolution/core/cache/mgr/context.cache.php’ for inclusion (include_path=’.:/usr/share/php:/usr/share/pear’) in /var/www/workspace/revolution/core/model/modx/modcontext.class.php on line 49
...