I decided to try a fictional historical league, but ran into a serious problem. I found that when I set the League Totalls Setting "AVG of balls in play", to below .220, the games are not simmed. This affected the historical sim I set up for 1915 because clicking the calculate button next for AVGBIP resulted in a value of .150 or something near there. With this value, I couldn't sim.
In trying to find the source of the problem I found that changing the setting to .210 prevents simming, while .220 doesn't have any ill effects. This is the only thing I had to change to get it to stop simming. That is not an exaggeration. Changing just the integral League Totals does not result in any problem. Only when I change to .210 (and .200, .190, .180 etc) was there a problem. I was able to sim with .220, .230, .240, .250, and the default .297.
After making the change and going to the schedule screen, I try to sim any length, and it doesn't work. The scoreboard in the upper right of the window doesn't show up, the league leaders on the left don't show up. The only thing that does show up is the league standings. Then nothing happens, and after a while I ALT-CTRL-Delete and find the program is not responding.
I am using Windows 98. (No jokes please

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I am not having any other problems. (I've been able to sim a league using "modern" settings for several seasons already without incident.)
Dave