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description: Object ID
---

# obj\_num

If _obj\_num_ = 0, the condition will be checked for the current object of the type specified by [obj](obj). If _obj\_num_ > 0, the condition will be checked for the object with the specified ID (in the object's [connect](../../connectivity/hru.con) file) only.&#x20;

Exception: prob\_unif where obj\_num is the first day of the period.&#x20;
