EXFO iOLM - Manual (Page 68)

Managing Test Configurations
62 iOLM
Modifying a Test Configuration
The element pass/fail status remains unknown in the following scenarios:

If any element is followed by 2:N splitter in the link then the element’s
loss pass/fail status is displayed as unknown.

If the element has a reflectance value and it is placed after the 2:N
splitter element, then the element’s reflectance pass/fail status is
displayed as unknown.

If the 2:N splitter is in a group of elements and an element follow the
2:N splitter in the group, then the pass/fail status of group is displayed
as unknown.