Solution : https://service.sap.com/sap/support/notes/951547 (SAP Service marketplace login required)
Key words :
PYMTMETH PYMTBLOCK DUNNBLOCKE211(>0) E212(>0) E114(>2) E115(>2)>0E211 >0E212 >2E114 >2E115
SAP Note 951547 - Incorrect checking of payment/dunning data
Component : Rental Accounting - Public Sector Contract Accounting