Run-Time Problem
This change of the relation's nature is impossible in play (P66)
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Most problems are detected when Inform translates the source text, but this is one of the exceptions, a "run-time problem" which emerges only during play. When a relation is created during play, it is usually created with a specific nature - for example, 'let R be a one-to-one relation of vehicles'. If none is given, it will be 'various-to-various'. This can't usually be changed once set, so this problem probably means you've tried to set the nature of the same relation more than once. |