Total = &1%, &3, period &2

What causes this issue?

You have entered distribution rules which settle &V1&% in total. This
applies for settlement view &V3& in period &V2&.
When checking the percentage total, the system found one of the
following errors:
The total percentage for the distribution rules is more than 100%
The total percentage for the distribution rules is less than 100% and
this is a rule for full settlement.
The total percentage for the distribution rules is less than 100% and
the 100% check is switched on in the settlement profile.

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?

You can ignore this message if you are settling by fixed amounts. The
settlement then checks whether the settlement sender has been fully
credited.
Otherwise, correct the percentages for view &V3& to be able to settle
exactly 100% in period &V2&.
If these rules are not full settlement rules (settlement type GES), you
can switch off the 100% check in the settlement profile. This procedure
also suppresses the message in future.
<ZH>Note</>
If you cannot find any fields where you can enter percentage values,
this is probably because the settlement profile is configured to hide
them. Switch on percentage settlement in the settlement profile, or use
equivalence numbers for your rules, if the project profile allows this.

Error message extract from SAP system. Copyright SAP SE.