Error on expanding Catalog Item Tree on create requisition page

Hi,

Upon expanding Catalog Item Tree on create Requisition page, below error is triggered-

First operand of . is NULL, so cannot access member Name. (180,236) FUNCLIB_PP.PV_CATALOG_FCTNS.FieldFormula  Name:NavCatTree  PCPC:18410  Statement:233

Called from:PV_REQ_ITM_WRK.PV_CATTREE_FC.FieldChange  Statement:3

The first operand of the dot operator is the NULL value, indicating the lack of any object value. As a consequence, the given method or property cannot be used.

The highlighted Tree name is inactive in the system, but still showing.

Please let me now if this issue is ever observed and solution.

Thanks,

Anagha