ORS § 70.260
Except as provided in ORS 70.250 to 70.275, upon withdrawal, any withdrawing partner is entitled to receive any distribution to which the withdrawing partner is entitled under the partnership agreement. If not otherwise provided in the partnership agreement, the withdrawing partner also is entitled to receive, within a reasonable time after withdrawal, the fair value of the withdrawing partner's interest in the limited partnership as of the date of withdrawal based upon the withdrawing partner's right to share in distributions from the limited partnership. For purposes of this section, the fair value of the withdrawing partner's interest in the limited partnership shall be determined by assuming that any distribution to which the withdrawing partner is otherwise entitled by reason of this section has been made.
ORS 70.260