3617166 - 'Cannot process Customer Project Expense List because Employee Time Calendar not yet posted in accounting'

Customer Project Expense List AAA is unposted with error:

'Cannot process Customer Project Expense List AAA because Employee Time Calendar BBB not yet posted in accounting' 

AAA means the Customer Project Expense List.

BBB means the Employee Time Calendar.

When searching for Employee Time Calendar BBB you notice that it's not cancelled nor marked as irrelevant. The Employee Time Calendar is not found under General Ledger work center -> Source Documents view. 

SAP Business ByDesign

Customer Project Expense List, CPEL, Employee Time Calendar, ETC, intercompany project; project company; employee time , KBA , SRD-FIN-GL , General Ledger , Problem