Upload meter readings: permitted number of 600 meter readings exceeded

What causes this issue?

During the upload of meter reading results using BAPI_MTRREADDOC_UPLOAD
or the IDOC from category ISU_MR_UPLOAD, it was determined that the
number of meter reading results exceeds the limit of 600. (Number of
meter reading results: &v1&).
Also see note 410327.

System Response

In this case, the system displays an error message. The meter reading
results are however imported.

How to fix this error?

As described in note 410327, large amounts of data can result in
performance problems and/or timeouts. Therefore, check why the
recommended limit was exceeded and take measures to reduce the number
of results.

Procedure for System Administrators

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

Error message extract from SAP system. Copyright SAP SE.