InfoObjects must be assigned to the DataSource fields

What causes this issue?

There are source fields to which no InfoObject was yet assigned.
However, you are using a rule type that require InfoObjects as the
source or you are using a unit or currency conversion type.

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

System Response

How to fix this error?

Fill in field <LS>InfoObject Assignment</> in area <LS>Source Fields</>
for each field that is used as a source for this rule.

Procedure for System Administrators

Error message extract from SAP system. Copyright SAP SE.