abaqus pde

hi all,

       i am very new to work in abaqus pde enviornment. i am trying to do pin on disc wear simulation. i had created a model, parts,sets surfaces and applied boundary conditions on the model and save it in.cae file. i am now trying to open the modeldatabase from the script environment

the comman i am using mdb=openMdb(patName+'wear.cae')

when i am compiling this command the database is opened in the GUI but the features i created are not appearing there. please help me. please knidly let me know where i am doing mistake.