Can someone tell me why I'm getting an Incorrect Syntax error at the last ELSE statement.

```
SELECT 
CASE WHEN PolType = 'PKG' THEN 

    CASE WHEN PkgDef & 1 = 1 THEN 'BA ' ELSE

    CASE WHEN PkgDef & 2 = 2 THEN 'BAT' ELSE

    CASE WHEN PkgDef & 4 = 4 THEN 'GS ' ELSE

    CASE WHEN PkgDef & 8 = 8 THEN 'DLR' ELSE

    'ERR' END 
ELSE 
    poltype 
END AS 'PolType'

FROM Parallel_Test.dbo.PolicyG 
WHERE rowid = (SELECT MAX(rowid) FROM Parallel_Test.dbo.policyg) - 10

```