Fast Formula using a DFF Error Message

Hi Team,

I would require your help to debug a FF which is using a DFF we are having this error when compiling "line 59, the statement contains an item of the wrong type."

We are using the following value set: CA_GET_DATE_ENTREE_GRP

FROM PER_ALL_ASSIGNMENTS_M B, PER_PERIODS_OF_SERVICE A

Value Column Name  A.ATTRIBUTE_DATE7

WHERE A.PERIOD_OF_SERVICE_ID = B.PERIOD_OF_SERVICE_ID

AND B.ASSIGNMENT_ID = :{PARAMETER.P_ASSIGNMENT_ID}

The Fast Formula is as follows:

ALIAS PER_ASG_CONTRACT_TYPE AS CONTRACT_TYPE

ALIAS PER_ASG_CONTRACT_ATTRIBUTE1 AS CONTRACT_NATURE