Hello, I am totally frustrated in trying to understand SCDs in a practical setting. What is odd, is that there is little on the web that actually explains the issues with altering cubes regarding SCDs. Heres a burning issue for me : If I have an existing cube built in SQL 2000 AS which is processed fully after having its dimensions and fact tables updated each night. I have a dimension that some idiot keeps altering values in and when we process the cube, the cube crashes out with a dimension processing error. We have datamarts that we draw our cube data and dimension data from. I am pretty sure its because changes have been made to the dimensions in the datamarts that supply the cube which is causing the issue. Can I get around this issue by altering the currently troublesome shared dimension to become a changing dimension, by changing the "changing" property from "False" to "True", or have I missed something? This is driving me crazy, as there seems to be a gap in info between advanced cube knowledge and very basic cube knowledge. Any help most welcome - an answer will be truly a valued resource on the web..... Thank you in advance...... Steve.