1991 BMW 525i e34 525 1991 24v transprogram

My 1991 525i has had the "Trans Program" error come up sporadically for about the past year. At first, all I had to do was shut the car off and wait a minute or two and it reset itself and everything ran fine. But as time went on, it was harder and harder to get it to reset. In my case, when the error message was not showing, the car shifted perfect. That lead me to
believe that the tranny was actually working fine. I just had some sort of intermittent electrical problem