In developing MCM values for my 90 year simulation (years 2010-2100), I assigned my MCM timestep values from 1 to 90 in the ‘Transition – multiplier values’ table. However, in St-Sim version 2.4.6, I used the years 2010 and 2100 as my start and end timesteps under the ‘Run Control’ tab. This mismatch between run control and multiplier timestep values generated incorrect results. As it should. Although this problem is obvious in hindsight, it took me days to figure out. I just wanted to bring it to the attention of other users.