求助，HFSS Warning: Poor convergence in seeding data

大家好！我在用HFSS的DrivenTerminal仿真一个结构时。出现了一个警告“Fast sweep setup, process hf3d: Poor convergence in seeding data.” 不知道是怎么回事啊?求助！ 以下是我仿真设置：
Solution Frequency: 14.25GHz
- Adaptive Solutions
Maximum Number of: 20
Maximum Delta S: 0.02
- Adaptive Options
Maximum Refinement Per Pass: 30%
Minimum Number of Passes: 1
Minimum Converged Passes: 2
谢谢！