Work Book Execution is very slow

Hi
Hi have created some workbooks in BI Production server.
Means  i have opened a query in analyser and saved it as a work book in BI Production.
But the work Book execution time is really slow and taking areound 15min to show the results.
As in case of same report in analyser the reports are fine are executing in time.
Can any body tell me waht is the problem

Hi,
I have a similar problem when attach a lot of queries in the same workbook, in this case i create a new workbook and add a table zone to attach the query, not opening the query and save like workbook.
Regards,
Dani

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