The phrase "although I was unable" is correct and usable in written English.
It can be used to introduce a contrast or exception in a statement, often indicating a limitation or inability in a particular context.
Example: "Although I was unable to attend the meeting, I made sure to review the notes afterward."
Alternatives: "even though I couldn't" or "despite my inability to".
Although I was unable to speak to Lehrer, I did reach his editor at Simon & Schuster, Jonathan Karp, whom I've known and respected for years.
Here I received my first inkling of the fate of the Jewish people; the stories my parents had told me about the Holocaust also deeply disturbed me, although I was unable to understand them fully at the time.
Although I was unable to travel to Oslo to see him deliver it -- by that time I had been assigned other duties at headquarters -- I was keenly aware of the goodwill it engendered.
Although I was unable to speak to Mr. Gates on such short notice, Vicki Phillips of the Gates Foundation said that the foundation supported Mr. Klein's efforts because "we saw very impressive gains in New York".
He claims it can take minutes with competitors (although I was unable to confirm that).
He claims it can take minutes with competitors (although I was unable to confirm that).
The N3400 is apparently "currently shipping" although I'm unable to find it in Averatec's online store at the moment.
But that idea is bunkum, because although I am unable to do the things I do in GTA, or Assassin's Creed, or Saints Row in real-life, I'm also unable to jump in a car and simply cruise around London.
Of those that experienced some difficulty, the main concern was the subjective nature of the outcome measure: It was difficult to grade a score out of 10 - although I am unable to suggest a better alternative … Plus the definition of soreness would have been different for everyone.
Although it was unable to exercise any real political influence, the party could project an image of political legitimacy.
The hospice was perceived relieve utter destitution, although it was unable to meet all the expectations that patients had.
