Table types are only allowed in TABLES parameters in RFC

What causes this issue?

You tried to assign a table type to an EXPORTING or IMPORTING parameter
of a remotely-callable function module. These types are only allowed in
the TABLES parameters of remotely-callable function modules.

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?

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.