ORA-00902 in Oracle Application Testing Suite

query in OATS

Query in DB

Hey guys I'm running this Script on OATS and it's showing the ORA-00902: invalid datatype error, but I run the same exact Query on my Oracle DB and it brings me the results as shown on the attached images, does anybody know why this might be happening?

Thanks

select FISCAL_YEAR,ACCOUNTING_PERIOD,LEDGER,ACCOUNT,DEPTID,CLASS_FLD,
sum(POSTED_BASE_AMT), SUM( POSTED_TRAN_AMT) from sysadm.ps_ledger A
where FISCAL_YEAR = '2018'
AND LEDGER IN ('REPORT','LOCAL','DREPORT','DLOCAL','CREPORT','CLOCAL')
and EXISTS (SELECT 'X' FROM sysadm.PSTREELEAF G
where G.tree_name='STATUTORY_ACCT'
    and G.setid='SHARE'
    and G.effdt= to_date('2018-08-31','yyyy-mm-dd') 
   and (G.TREE_NODE_NUM BETWEEN 914962101 AND 1237889900
   )
   and A.ACCOUNT = G.RANGE_FROM)
and EXISTS (SELECT 'X' FROM sysadm.PSTREELEAF G
where G.tree_name='RPT_DEPT_BL'
    and G.setid='SHARE'
    and G.effdt= to_date('2018-08-31','yyyy-mm-dd')
   and (G.TREE_NODE_NUM BETWEEN 1684955749 AND 1999972344
   )
   and A.DEPTID = G.RANGE_FROM)
group by FISCAL_YEAR,ACCOUNTING_PERIOD,LEDGER,ACCOUNT,DEPTID,CLASS_FLD