We have a released a program fix for Sage 100 2018.8 and 2018.9. This fix addresses the errors:
“Record: J/Cxxx is missing from SY0CTL.SOA" followed by "Error 11 SWVDTE 0520" when accessing Job Cost Tasks
Or
"The J/C Accounting Date (MM/DD/YYYY) does not fall within the Current and One Future Period for the module" when accessing Job Cost Tasks when 'Restrict Accounting Date to Current and One Future Period' is enabled in Company Maintenance and 'Allow Accounting Date Beyond One Future Date' is unchecked for the users Role in Role Maintenance.