In case of this error message:.
Error-200, Message: HTTP Error
- Open wp-config.php in your sites main directory via FTP (or cPanel)
- Scroll to the line which reads
/* That’s all, stop editing! Happy blogging. */
- Add the code
set_time_limit(60);above the line
/* That’s all, stop editing! Happy blogging. */text
Set the set_time_limit(300);
Some hosting companies may not allow you to overwrite this setting from wp-config. However, you can still try.
Here is a list of other common limits you can check and set to max possible (if your server allows it)
Copy from here: http://wordpress.mcdspot.com/2012/03/20/ways-to-increase-max-file-upload-size-and-execution-time/