Hi Ben,
A lot of syntax errors...
Can you provide full DM advanced script?
And looks like the line have to be corrected:
*SELECT(%BU_SEL%,"[ID]",COSTCENTER,"[BUSINESS_UNIT]=$BU$")
Assuming that:
1. You pass BU from prompt %BU% using REPLACEPARAM TASK
2. BUSINESS_UNIT - is the property name for COSTCENTER dimension
Vadim