Plaintiff lessor appeals after the trial court, sitting without a jury, found against him on his claim for damages arising out of the alleged negligence of his lessee, defendant. Plaintiff alleged that defendant’s negligence caused a fire that destroyed plaintiffs building. The trial court ruled that plaintiff failed to prove that defendant’s negligence caused the fire. We affirm.
Plaintiff owned a commercial building in Lyons, Oregon, that he leased to defendant. Defendant was the building’s only tenant. In the building, defendant operated a woodworking business that produced cedar hot tub enclosures. His employees used stationary electrical power tools to cut the cedar and water-based wood stains to treat the wood. On an average day, there were eight to ten employees working in the building. When the business closed each day, defendant’s employees were instructed to turn off all power to the building at the power source and to padlock or secure all of the doors. On most days, the building was also swept and vacuumed several times to minimize the amount of sawdust left inside.
The employees reported that, at the close of operations on August 31, 1995, they followed the same procedure regarding the turning off of the power and the securing of the doors. No one observed a fire burning inside the building when defendant’s last employees left that day, but there was some sawdust on the floors and in some areas of the building. By about 6:30 that evening, the building was in flames and was eventually completely destroyed by fire. The fire was not observed or reported until defendant’s last employee had been gone for about three hours.
Several days after the fire, a private investigator and a Deputy State Fire Marshal investigated the cause of the fire, once the building was safe to enter. They found no evidence of arson — there were no signs of forced entry, there was no evidence of a motive to bum the building, and no indications of the use of any chemical accelerant or ignition agent. Both investigators noted that there had been no electrical power to the building at the time the fire started and *429that there were no signs of electrical malfunction. The private investigator observed that there was a motor covered in sawdust in the shop area but that it was not in the area where the fire had probably started. The Deputy State Fire Marshal concluded that the cause of the fire was “unknown.” The private fire investigator concluded that defendant’s negligence caused the fire.
Plaintiff brought this action, alleging that defendant had breached the lease with plaintiff and that his negligence had caused the fire. The breach of lease claim was based on a dispute about defendant’s obligation to insure the building and its contents against fire. The parties ultimately reached a stipulation on that claim, which limited defendant’s liability if defendant were found to have been negligent. As to the claim of negligence, plaintiff alleged that defendant (1) used products that were combustible (the lumber) in a careless and reckless manner, (2) failed to use care commensurate with the danger created by his work activities, and (3) failed to supervise his employees adequately. Defendant denied the allegations of negligence. The parties waived a jury trial.
At trial, plaintiff presented evidence of the above facts regarding defendant’s use of the building. The private investigator testified that a fire requires three elements: a spark or source of ignition, a fuel, and a force that brings the spark and the fuel together. He provided pictures taken after the fire that demonstrated that there had been sawdust in the building that could have served as the fuel for the fire. Plaintiff argued that defendant’s failure to remove the sawdust was negligence in and of itself and was sufficient to hold defendant liable for negligence. He asserted that, even if a spark had been introduced into the building by a non-negligent cause, the fire would not have occurred had all the sawdust been removed.
As to a possible ignition source, plaintiffs expert testified that he had ruled out an electrical malfunction and arson as causes of the fire. In light of that testimony, plaintiff *430argued that the court should use the doctrine of res ipsa loquitur to provide an inference of causation.1 Plaintiffs expert also testified that he believed that a cigarette left smouldering in the workplace by one of defendant’s employees could have been the ignition source. However, no evidence of a cigarette as the cause of ignition was found. Defendant offered the evidence from the Deputy State Fire Marshal that the cause of the fire was “unknown.”
Neither party asked the trial court to make special findings of fact or conclusions of law under ORCP 62. The trial court took the case under advisement and ultimately found for defendant. It issued a letter opinion setting forth its ruling. Plaintiff makes three assignments of error on appeal. First, he contends that “[t]he court erred in failing to apply the doctrine of res ipsa loquitur to infer that the fire was caused by [defendant’s] negligence.” Second, he asserts that “[t]he court erred in failing to find [defendant] negligent as a matter of law.” Finally, he argues that “[t]he trial court erred in failing to consider the accumulation of sawdust as a cause of the fire.” He also contends that we should review the trial court’s factual determinations for “substantial evidence” and its legal conclusions for errors of law.
In plaintiffs first assignment of error, he argues that the trial court misunderstood the doctrine of res ipsa loquitur, which led to an erroneous conclusion that plaintiff had failed to carry his burden of proof. Plaintiff asserts that the trial court’s recitation of the elements of res ipsa loquitur in its letter opinion demonstrates its error and contends that “in a case tried without a jury, if the court is influenced in making its factual findings by an error of law, reversal is appropriate.” As authority for that proposition, he cites Babler Bros. v. Pac. Intermountain, 244 Or 459, 466-67, 415 P2d 735 (1966).
*431In Babler Bros., the plaintiff bought gasoline from the defendant and, during the delivery of the gasoline, the plaintiffs agent incorrectly measured the level of gasoline already in the plaintiffs storage tank. As the gasoline was being discharged from the defendant’s truck into the plaintiffs tank, the gasoline overflowed and ultimately exploded, injuring one of the plaintiffs employees and damaging the plaintiffs property. The plaintiff sued the defendant for damages, claiming negligence. The defendant defended on the ground that the explosion was caused by the plaintiffs negligent measurement. The case was tried to the court. The court found the defendant negligent and legally culpable. The court also found the plaintiff negligent, but ruled that it was foreclosed by the rule of a Supreme Court case from characterizing the plaintiffs negligence as a “proximate cause” of the harm. The court therefore ruled for the plaintiff.
On appeal, the Supreme Court overruled its case on which the trial court had relied. The plaintiff nonetheless argued that the trial court’s result ought to be affirmed because there was evidence on which a jury could have exonerated the plaintiff of contributory negligence, and that even if the trial court had incorrectly perceived the law, it could have reached the same result. In rejecting that argument, the court said,
“The trial record shows that the judge was led, by Oregon Mutual Fire Ins. Co. v. Mayer, [211 Or 556, 316 P2d 805 (1957),] into applying an incorrect rule of law, i.e., holding as a matter of law that the negligence of the plaintiff was not a ‘proximate cause’ of the harm. Does such an error require reversal? It is argued in support of the judgment that the finding of fact, standing alone, is one which the court might properly have made. A jury could have exonerated plaintiff of contributory negligence. Therefore it is argued, the trial court’s decision accomplishing the same permissible result ought to be affirmed. The analogy between judge and jury as triers of fact breaks down, however, when it is recalled that a jury verdict is good only if the jury was properly instructed. When the record discloses that the jury applied the wrong law to the facts, the verdict cannot stand. Where an error of law is shown to have influenced the court trying a case without a jury, reversal is *432equally necessary.” Babler Bros., 244 Or at 467 (emphasis added).
Plaintiff argues that the trial court’s misapplication of the law of res ipsa loquitur in this case has the same effect as the court’s misapplication of the law in Babler Bros, and thus compels reversal. The predicate to plaintiffs argument is the assertion that the trial court incorrectly understood the doctrine of res ipsa loquitur. For purposes of the analysis of that argument, we assume without deciding that we can review the trial court’s decision for errors of law under Babler Bros.2
Plaintiff points to the paragraph in the trial court’s letter opinion in which the trial court said:
“Plaintiff must produce evidence sufficient for the court to find that:
“1) The cause of the damage is one that ordinarily in the normal course of events would not have happened unless the Defendant was at fault; and
“2) That the instrumental[ity] of the damage was in the exclusive control of the Defendant; or that the evidence connects the incident to the defendant’s conduct rather than other causes.”3
The trial court’s opinion continued:
“I agree with Defendant’s argument that this fire is not akin to a beer barrel falling from a second story of a brewery. (It is likewise unlike a clamp left inside a patient after heart surgery.) It is true that ordinarily a beer barrel would not fall from a window absent negligence, but a fire in a wood shop (even where the power is turned off) does not necessarily result in a conclusion that it is more likely than not that it was started by Defendant’s negligent means.
*433* % * *
“While it might be tempting to conclude the cause of a fire simply from the fact that the fire occurred in a building which was locked with the power off, one must resist the temptation unless the conclusion is logical and based upon reasonable inquiry and that it was more likely to have resulted from Defendant’s negligence. Here, such is not proven. Plaintiffs case fails on res ipsa loquitur as well.
“Conclusion^] Plaintiffs case fails to meet the burden of proof.”
As a result of its conclusion, the trial court entered judgment in favor of defendant.
At oral argument, plaintiff contended that the first two sentences of the court’s opinion misstate the law in several ways. First, plaintiff argues that the trial court’s use of the phrase “the cause of the damage is one that ordinarily in the normal course of events would not have happened” is an erroneous statement of law because plaintiffs must show only that the “event” ordinarily would not occur in the normal course of events, and that it does not have to prove the “cause” of the damage under res ipsa loquitur, which allows a court to infer causation. We disagree that the statement is erroneous. When the statements in the court’s opinion are read in context, it is clear that the trial court’s focus throughout its opinion was on the fire itself and that the trial court understood that plaintiff did not have to prove the precise cause of the fire. Second, plaintiff argues that the trial court conflated the concepts of negligence and fault in the first sentence. According to plaintiff, the trial court should have said, “but for negligence,” instead of using the phrase, “unless defendant was at fault.” We do not understand how the trial court’s choice of words in that context could have influenced it to misapply the law. In fact, the Supreme Court has stated the test almost the same way. See McKee Electric Co. v. Carson Oil Co., 301 Or 339, 348, 723 P2d 288 (1986) (“A plaintiff need only plead ultimate facts that, if true, show that an injury occurred in circumstances that more probably than not would not have occurred in the absence of negligence on the part of the defendant.”) (Emphasis added.).
*434Third, plaintiff argues that the trial court incorrectly required him to prove that defendant was in “exclusive” control of the instrumentality that caused the fire. He points to the trial court’s second sentence. In Pattle v. Wildish Construction Co., 270 Or 792, 797, 529 P2d 924 (1974), the court explained that the requirement of control by the defendant under the doctrine of res ipsa loquitur does not mean that the defendant must have had exclusive physical possession of the injury-producing instrumentality. Rather, the requirement is that it must appear from the evidence that the negligence of which the thing speaks is probably that of defendant and not of another. Plaintiffs characterization of the trial court’s opinion fails to acknowledge the rest of the trial court’s second sentence, which provides an alternative method of demonstrating the requisite control of the instrumentality. That phrase says, “or that the evidence connects the incident to the defendant’s conduct rather than other causes.” The trial court’s sentence adequately restates the test set out in Pattle.
Finally, plaintiff argues that the trial court erred in not including in the second sentence the requirement that the evidence “more probably than not” connects the incident to defendant’s conduct. However, it is clear from the remainder of the trial court’s opinion that it was applying a “more probable than not” standard. Elsewhere in its letter opinion, the trial court, quoting Barrett v. Emanuel Hospital, 64 Or App 635, 638-39, 669 P2d 835, rev den 296 Or 237 (1983), said:
“A plaintiff must establish that * * * there is an injury, that the injury ‘is of a kind which ordinarily does not occur in the absence of someone’s negligence,’ and that the negligence that caused the event was more probably than not attributable to a particular defendant.” (Emphasis added.)
The trial court also understood, as shown in another portion of its letter opinion, that,
“{res ipsa loquitur] allows the fact finder to infer both negligence and causation, if the accident ‘is of a kind which more probably than not would not have occurred in the *435absence of negligence on the part of the defendant.” (Emphasis added; citation omitted.)
When the trial court’s statements are read in the context of its opinion as a whole, we discern no evidence that the trial court misunderstood the doctrine of res ipsa loquitur. Consequently, there is no “error of law” that affected the trial court’s factfinding process in arriving at the decision that plaintiff had not carried his burden of proof. Accordingly, we reject plaintiffs first assignment of error.
Plaintiff s second assignment of error is that the trial court erred in not finding defendant negligent as a matter of law. The short answer to plaintiffs assignment is that the trial court was never asked to make such a ruling. No motion was made under ORCP 60 or ORCP 62, so there is no ruling by the trial court for us to review in that regard.
Plaintiff argues under his third assignment of error that the trial court erroneously required plaintiff to prove the precise ignition source that caused the fire and that it failed to consider the sawdust as evidence of defendant’s negligence. If defendant’s assignment of error is an assertion that there is no evidence to support the trial court’s conclusion, it is incorrect. There is evidence in the record from which the trial court could have concluded that the origin of the fire was unknown, and the trial court was not required to draw the inference of causation urged by plaintiff. If defendant’s assignment of error is meant to assign legal error, it fails for the same reason that his second assignment of error fails.
Affirmed.
“Res ipsa loquitur is a rule of evidence whereby circumstantial evidence may be used to prove ultimate facts. More specifically, it allows the jury to infer both negligence and causation * * * if‘the accident which occurred * * * is of a kind which more probably than not would not have occurred in the absence of negligence on the part of [the defendant.]’ ” Fieux v. Cardiovascular & Thoracic Clinic, P.C., 159 Or App 637, 640, 978 P2d 429, rev den 329 Or 318 (1999), quoting Watzig v. Tobin, 292 Or 645, 649, 642 P2d 651 (1982) (citation omitted).
Even though plaintiff did not make a motion for judgment as a matter of law to the trial court, it could be argued that he would have had no way of discerning that the trial court misunderstood the doctrine of res ipsa loquitur until he received the court’s letter opinion.
The court’s summary of the law of res ipsa loquitur appears to be taken verbatim from defendant’s trial memorandum.