When viewing system events for a Detection server there is the following event:
EDM profile search failed:EDM profile search failed
In the FileReader0.log you may see the following error:
WARNING: EDM profile search failed. Failed to lookup index in RAM index process IDX_2_170. No further incidents will be detected against this RAM index instance.
Find the value of the following in Indexer.properties
# If a term appears in SDP more then this number of times,
# it is considered a common term with appropriate ramifications
# during SDP indexing and detection.
If this value is more than 10, please ensure that it is set to 10.
For additional info on this setting please refer to the referenced article TECH218853.