SAP Message W0166 - An error occurred when the data for site &1 was being read DOCUMENTATION DiagnosisAn internal error has occurred.System ResponseINCLUDE ISR_VERARBEITUNG OBJECT DOKU ID TXProcedure for System AdministrationCheck the site data for site &V1&. The error occurred when the functionmodule location_select_plant , which reads the site data, was called.