金光明最勝王經疏 4.112

4.112

即細相現行障。微細諸相，即細生相。作意欣樂無相，即觀細滅相。由於六地作緣起觀見有生滅，彼障七地妙無相道，未能即空起有勝行，故入七地除。

This is the obstacle of the active manifestation of subtle characteristics. "Subtle characteristics" refers to subtle characteristics of arising. "Deliberately delighting in the signless" refers to contemplating subtle characteristics of cessation. Because in the sixth ground one contemplates dependent origination and sees arising and cessation, that obstructs the wondrous signless path of the seventh ground, and one is not yet able to initiate supreme activities of phenomenal existence directly within emptiness; therefore, it is eliminated upon entering the seventh ground.