SAP ABAP Class CX_RSTT_INSTANCE_HANDLER (Exception in RSTT Instance Administration) is using

• Class (5)
• Data Element (6)
• Interface (2)
• Message Class (1)
• Message Number (1)
• Class Method (1)
• Table (2)

#	Object Type	Object Name	Object Description	Note
1	Message Number	RSTT0 - 542	Instance &1 (&2) of class &3 has not been registered correctly