This is a really annoying error of the last version of Aptana Studio. This error comes out when the application is starting. I like this IDE for many things, but this error is very stupid because this occurrs just with the last build of Aptana Studio.
Everything looks fine, but then appears a window saying: "...See the .log file for more details...", but I can't find that .log file.
When I found how to fix it, I'll write the solution. This is the screenshot:


Yes, it’s really annoying! I’m going to downgrade aptana!
Yes… but… here is the solution: http://www.davidtavarez.com/archives/aptana-studio-startup-workbench-error-on-linux-solution/
I’ve not read anything yet, but i’ve find a solution by myself, just say “Never display Aptana home” in preferences… i supose your solution is the same, i’ve come only for tell you!