Most of us while working on CRM, faces error codes returns by CRM. CRM does give you error messages every now and then. The message is usally in the format of "0x12345678". The numbers do not tell much, but the corresponding error message do help you definitely. These error messages are given in the SDK and on a lot of places on the internet, but there the "0x" has been removed from the error message. Here is the same list as which is listed in the SDK, but now with the included 0x, posted by Ronald in his blog.