Ensure that the internal aggregation attribute AT_INTERNAL_COMPRESSCRITERION is specified in the attribute configuration of your PPM system (see Definition of attribute types and attribute type groups).
attributenames.xml
...
<attribute key="AT_INTERNAL_COMPRESSCRITERION"
name="Compression criteria"/>
...
attributetypes.xml
...
<attributedefinition key="AT_INTERNAL_COMPRESSCRITERION"
type="TEXT" group="AG_KPI_COMPRESS"/>
...
In the aggregated process instance in the AT_INTERNAL_COMPRESSCRITERION process attribute, all aggregation criteria are listed, i.e., all process dimensions included as iterations in the aggregation paramset used as well as all data access dimensions (see Definition of data access dimensions). If set, the refinement level is specified after the internal name of the dimension in parentheses.
The PROCESSTYPE process dimension is always included in the internal aggregation attribute because it is part of each aggregation paramset. The TIME process dimension, however, is only included if it is contained as an iteration in the paramset. If only a time filter is contained in the aggregation paramset, the Time dimension (as other time dimensions of the timedim or hourdim type) is not listed as an aggregation criterion.