WARNING [4045]: MINIMUM ALLOWED TIME STEP REACHED. TEMPERATURE CHANGE PER INCREMENT MAY BE LARGER THAN SPECIFIED

Cause

When the automatic time step function is used in transient heat transfer analysis, this warning is generated if the time step required to satisfy the maximum temperature change per step increment is smaller than the time step at the maximum bisection level.

Analysis Type

Transient heat transfer analysis

Related Menu

[Not Applicable in FEA NX]

Analysis Case >> Subcase Control >> Nonlinear Transient >> Auto Time Step...

Remedy

Since the minimum time step has not satisfied the maximum temperature change per step increment, check to see if an excessive load has been applied.  Or adjust the maximum bisection level (advanced nonlinear parameter) for accurate analysis within the allowable range of calculations.