Looks like originally the system was 7.0 
Anyway, correct DM advanced script to (using standard chain DEFAULT_FORMULAS_LOGIC!):
PROMPT(TEXT,%BUYERCODE%,"YOU MUST Enter a Single Buyer Code (ex: GA)")
PROMPT(TEXT,%FISYR%,"YOU MUST Enter a Fiscal Year (ex: 2011)")
INFO(%EQU%,=)
INFO(%TAB%,;)
TASK(/CPMB/DEFAULT_FORMULAS_LOGIC,SUSER,%USER%)
TASK(/CPMB/DEFAULT_FORMULAS_LOGIC,SAPPSET,%APPSET%)
TASK(/CPMB/DEFAULT_FORMULAS_LOGIC,SAPP,%APP%)
TASK(/CPMB/DEFAULT_FORMULAS_LOGIC,TAB,%TAB%)
TASK(/CPMB/DEFAULT_FORMULAS_LOGIC,EQU,%EQU%)
TASK(/CPMB/DEFAULT_FORMULAS_LOGIC,LOGICFILENAME,BUYER_ALLOC_REQ_QTY.LGF)
TASK(/CPMB/DEFAULT_FORMULAS_LOGIC,REPLACEPARAM,BUYERCODE%EQU%%BUYERCODE%%TAB%FISYR%EQU%%FISYR%)
Second: the script itself contains absolutely old (From BPC 7.0 How-To):
*START_BADI DAPP
...
Have to be properly replaces with standard:
*DESTINATION_APP=...
And other things in the script have to be analyzed!
Vadim