ID:265019 Pattern match string in function "<name>" contains illegal characters

CAUSE: The pattern match string of the specified function contains illegal characters. As a result, the Quartus Prime software cannot save or compile the Signal Tap File (.stp). The pattern match string can contain only the following characters: H, L, R, F, E, and X.

ACTION: If you manually edited the STP File, restore the STP File to its original state or create a new STP File. If you used an EDA tool to generate the STP File, contact the EDA tool vendor for technical support regarding this message.