我做一个最简单的简支梁时候碰到的问题，附上错误信息和CAE

运行时出现下面情况
The job "Job-11" has been created.
The job input file "Job-11.inp" has been submitted for analysis.
Error in job Job-11: NODE SET ASSEMBLY__PICKEDSET12 HAS NOT BEEN DEFINED
Error in job Job-11: NODE SET ASSEMBLY__PICKEDSET13 HAS NOT BEEN DEFINED
Error in job Job-11: A BOUNDARY CONDITION HAS BEEN SPECIFIED ON NODE SET ASSEMBLY__PICKEDSET12 BUT THIS NODE SET IS NOT ACTIVE IN THE MODEL
Error in job Job-11: A BOUNDARY CONDITION HAS BEEN SPECIFIED ON NODE SET ASSEMBLY__PICKEDSET13 BUT THIS NODE SET IS NOT ACTIVE IN THE MODEL
Error in job Job-11: NODE SET ASSEMBLY__PICKEDSET11 HAS NOT BEEN DEFINED
Error in job Job-11: A CONCENTRATED LOAD HAS BEEN SPECIFIED ON NODE SET ASSEMBLY__PICKEDSET11. THIS NODE SET IS NOT ACTIVE IN THE MODEL
Error in job Job-11: NODE SET ASSEMBLY__PICKEDSET12 HAS NOT BEEN DEFINED
Error in job Job-11: NODE SET ASSEMBLY__PICKEDSET13 HAS NOT BEEN DEFINED
本人刚学abaqus，希望能说的具体一点，谢谢了！
附上CAE文件，做的是一个最简单的简支梁