You can change the default file name pattern.

The Ericsson IMS Metrics File provides a complete listing of the expected counters for the file pattern type. This spreadsheet is available on the online support website.

Table 1. Node, Performance Category, Default file name pattern and 3GPP Format
Node Performance category Default file name pattern 3GPP format
SOI ims-ems-activation C20.*ims-emsactivation.xml PM 3GPPXML TS 32.435