Got error after hitting DecodeFlightRoute Api



I got an error when i want to get result of DecodeFlightRoute API. The error is –

ERROR: can’t find package Cplan CONTEXT: can’t find package Cplan while executing “package require Cplan” (procedure “__PLTcl_proc_16876” line 4) invoked from within “__PLTcl_proc_16876 48.355 -122.6616667 128 50” in PL/Tcl function “decode_vor_radial” PL/pgSQL function jc_unroll_route(character varying) line 363 at assignment.

Please help.