How To Fix UPF171 - Type &2 of parameter &1 is invalid

SAP Error Message - Details

• Message type: E = Error

• Message class: UPF - Planning Functions

• Message number: 171

• Message text: Type &2 of parameter &1 is invalid

What causes this issue?

Type &V1& of parameters &V2& is not permitted. The only types that are
permitted are types F, I, D, STRING or data elements.

System Response

The system issues an error message and will not allow you to continue with this transaction until the error is resolved.

How to fix this error?

Modify the function module interface accordingly.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.