Diagnosis
The end of the billing period, &v3&, which isspecified for the secondary installation &v1&, does not match the end ofthe billing period, &v4&, specified for the
higher-level secondary installation&v2&.
Background:
This situation is similar to that described in error message017. The system did find a billing document forhigher-level installation &v2&. However, the end of the billing periodfor the higher-level secondary installation must not be before the endof the billing period for the lower-level secondary installation.
Possible cause:
You performed interim or final billing for secondary installation &v2&without billing the lower-level secondary installation &v1& on the samedate.

Procedure
Bill the secondary installations on the same date.