Crash at the summoning brazier

SIralm v0.5.4, Windows 10. Had been summoing monsters, just done about 350. Game crashed when I hit “I want to summon a creature”


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FATAL ERROR in
action number 1
of Draw Event
for object obj_summoncreature:

Variable obj_refinery.(100095, -2147483648) not set before reading it.
at gml_Object_obj_summoncreature_Draw_64
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stack frame is
gml_Object_obj_summoncreature_Draw_64 (line -1)