actran运行问题

各位大侠：我用actran出现下列错误，怎么也解决不了啊，忘不吝赐教，先谢啦
---- FATAL ----
The following error occurred:
Traceback :
File "% ACTRAN_PRODUCTLINE%\site-packages\DIRECT\Actran.py", line 621, in main
File "% ACTRAN_PRODUCTLINE%\site-packages\DIRECT\Actran.py", line 216, in run
File "% ACTRAN_PRODUCTLINE%\site-packages\DIRECT\Scenario\FrequencyScenario.py", line 49, in create_component_trees
File "% ACTRAN_PRODUCTLINE%\site-packages\DIRECT\ActranComponent.py", line 416, in create_components
File "% ACTRAN_PRODUCTLINE%\site-packages\DIRECT\ActranComponent.py", line 266, in prepare_modal_duct_physics
File "% ACTRAN_PRODUCTLINE%\site-packages\pyfemtown\Component\py\__init__.py", line 617, in cut_off_frequencies
File "% ACTRAN_PRODUCTLINE%\site-packages\pyfemtown\Component\py\__init__.py", line 590, in add_propagating
---------------
Aborting application...
Aborting !
[done with F:\benchmark\icem+actran 2\actran1\cavity.dat]