Diagnosis
Field catalog &v1& was defined in the V_T_FIELD_CAT view using classV2. a runtime error occurred when the get_field_tab method wascalled.

Procedure
Check the definition of class &v2&:

• The class must implement the IF_PT_CUST_FIELD_TAB interface


• The GET_FIELD_TAB method must also exist for the class

You can copy the sample CL_PT_CUST_FIELD_TAB_CHK class from thestandard SAP System.