Hi Lilkar,
You'll have to set the Tracelog Level to Medium to get the warnings and error alerts, check this out.
That image is from SAP BO 4.1 SP1 Admin Guide - Page 842. Please go through the sections 25.2 and 25.3.
https://help.sap.com/businessobject/product_guides/sbo41/en/sbo41sp1_bip_admin_en.pdf
Thanks,
Mahboob Mohammed