Element 6901 instance part-1-1 cannot be added using *model change if it is not removed or inactive in the previous step
Element 6902 instance part-1-1 cannot be added using *model change if it is not removed or inactive in the previous step
Element 6903 instance part-1-1 cannot be added using *model change if it is not removed or inactive in the previous step
Element 6904 instance part-1-1 cannot be added using *model change if it is not removed or inactive in the previous step
Element 6905 instance part-1-1 cannot be added using *model change if it is not removed or inactive in the previous step
Element 6906 instance part-1-1 cannot be added using *model change if it is not removed or inactive in the previous step
Element 6907 instance part-1-1 cannot be added using *model change if it is not removed or inactive in the previous step
Element 6908 instance part-1-1 cannot be added using *model change if it is not removed or inactive in the previous step
Element 6909 instance part-1-1 cannot be added using *model change if it is not removed or inactive in the previous step
Element 6910 instance part-1-1 cannot be added using *model change if it is not removed or inactive in the previous step
Analysis Input File Processor exited with an error.
Can anyone please help me in resolving this error?
I have attached the CAE file also.