Hello,
I am receiving the error "Failed to connect to the OLAP source" when i schedule a query to run in BI launch pad. The query runs normally in BI launch pad if i don't schedule it. But the weird thing, is that i can run it if i do not have the Business Intelligence client installed on my PC. I am running BI 4.1. I have tried it with client 4.0 and 4.1 neither work. The same query which i scheduled a few months ago runs like Forrest Gump 
every morning without error. So this must be something that has just come about.
If I uninstall the client i can schedule the queries to run, but i can only uninstall it once. 
Best regards,
Lisa