Not able load Pending Worker

Summary

Not able to Load Pending Worker

Content

Not able to load pending worker file and getting below error message.

Import error

" A parent for this record was not found. Use any of the four supported key-resolution systems to supply a valid parent reference."

Load Error 

" The record referenced by the foreign key attribute PeriodOfServiceId was not found. Either specify a valid foreign key or create the referenced record first"

"The WorkTermsSDO attribute value is required. You must enter a value."

Can any one please help on this