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ERROR in
action number 1
of Other Event: User Defined 0
for object obj_army_or_mob:

DoMul :: Execution Error
at gml_Object_obj_army_or_mob_Other_10
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gml_Object_obj_army_or_mob_Other_10 (line -1)
gml_Object_obj_army_Draw_0 (line -1)

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The only solution I know to resolve this issue is by deleting it from the MAP.. or KILLING IT in the game.. (But it's not possible to kill it) ._.