pstansbu

I tend to alternate strong and weak NT with different partners. In a moment of aberration I opened 1NT on a 15 count when playing with a weak convention card. No sooner had I placed the card on the table did I realise my error (I know that might be immaterial - I had already pulled the card with apparent intent) On the night I let it stand just in case. Could this ever be classified as unintended (assuming I made a timely change)?

Thanks both :)

Oops title should read Misbid not Missed <_< During an auction my partner made a cue bid which I alerted. No questions were asked at that point. Partner was making a conventional cue bid asking for a stop and I, for some reason, took this to be showing support for the suit I had bid. The auction passed out at this point and I realised my mistake. Prior to the opening lead the opponents asked about my alert - in fact the question was "what did I understand by the xxx bid?" to which I responded "I took it to show support for my suit". Once the lead had been made partner pointed out that my explanation was incorrect. In this case I think we all knew the mistake at that point and we had missed an NT game as a result of my error so the opponents were happy to let things stand. What explanation should I have given at that point - my mistake, the correct convention or both? Also am I right in thinking that partner should have made his correction before the opening lead went down and not after?