On line 762-764 in src/param.h:
{"THRESHOLDMAX", "Maximum threshold possible for detection",
&outobj.dthresh, H_FLOAT, T_FLOAT, "%12.7g", "count",
"phot.flux.sb;stat.max", "ct"},
which uses exactly the same attribute dthresh as line 212.
However, I suppose the so-called "Maximum threshold possible for detection" should be the max value above which the given detection will no longer be valid (since the number of detected pixels will be smaller than DETECT_MINAREA). More explicitly, why are we using &outobj.dthresh instead of &outobj.mthresh here?