Data mart not updating - all individual tables work

[christert]

Hi all! 

I have set up a data mart consisting of data from several data sources. A week ago it stopped refreshing data. I have checked all individual tables and sources and everything loads and work as it is supposed to. I am however unable to update the data mart. It stops after a few seconds with no reason as to why it stops. 

The update history log shows the duration before it stops. In the log file there is no information, just the headings. How can i figure out the reason for why it stopped working? I need this to work 🙂