When running performance methods Summit displays "Error clsserver - RunFlaCmpCOde2014" and stops.
This happens when the program is performing the baseline calculations as indicated in the bottom status bar.

After the program creates the baseline building, it auto-sizes the systems in the baseline building.
If a multiplier greater than one is used in the system input, the total system size is calculated for all the zones served by the system and then divided by the multiplier.
One occasions with very low zone loads, the resulting system size is less that the minimum required for the system to operate. This causes the error.

The solution is to reduce the system multipliers so that the resulting system size is acceptable and the error disappears.
This should not cause any significant discrepancy in the results, even when the multiplier is reduced to 1.