When I was very new to new to magento I got error message Exception printing is disabled by default for security reasons. It was quite frustrating, but after digging lot of forums I came to know why printing is diesel and how to deal with this error.
Its advisable to enable printing in to development environment only as it will show some more information about the website. so there are two ways we can see what is going wrong
1. Enable printing method so you can view the error code within this page or
2 See the apache server error log or see “/var/reports/” folder of magento. report folder has flat file which has very bad name only number which is little difficult to remember. If there is any new file created, read this file. It will surely guide you to the problem area.
Now lets see how to handle exception printing in magento.
Default code looks like as follows.
default Store Debug Information leave
Configure default code to something like mentioned bellow and replace you email with firstname.lastname@example.org so that system will send you email update on this email id.
default Magento Commerce store debug Information email@example.com leave