Hi Experts

I created a Business Report for reporting Project Cost based on a accounting structure. If I set the paremeter for  project ID  to multi Value and select several project then i takes me more than 15 min

If uncheck the box and set to single value then it takes the BR less than 1 min per project. So i end up faster when i select every project one by one.

Now i tried it with Data Mart but ended up with the following error message. Neverthless i tought it would be faster now with data mart. now i am not sure if the data mart really took effect since the performance was not better then setting to online

My question

how do I setup the data mart correctly. Do i need to define something in the information source?

Best Regards

Sophal