Hi Christine! 
The BOMPRN report just can be runned in this function: Common Data > BOMs > Print BOMs. 

thanks for reply- I guess it wasn't this report then that I saw the user run.  Would you know which report can be run before production tracking that displays the total material and labor cost values?  I thought it was BOMPRN but this just displays the BOM listing.  thanks again

Sorry for the delay! I didn't see your comment! 

But, if you are still looking for the report: could you try with the "MFGCOST" report?
I think maybe that's the one.

thanks for reply but the mfgcost doesn't work when I run.  Believe its due to the Identifier field (report using areportm table)  Does this report need to be run from a function? thanks.