Error: Closing or opening transactions cannot be created for account ####

Hi guys

When I was doing Opening transactions under path: General Ledger> Periodic> Financial year close> Opening transactions, I got error “Closing or opening transactions cannot be created for account ####”. Do you know where I went wrong? My version is AX 2012 RTM with public sector. Public sector is not required but we don’t disable it as we afraid we may have trouble later. I appreciate for any input as now I feel like facing a dead end. No way to get accounts closed.

Cheers