Errors in running APList : unable to open file "CoreApiHtmlx.sql"

Error:
unable to open file "CoreApiHtmlx.sql"
unable to open file "AddOnApiHtml.sql"
begin -- begin1
*
ERROR at line 1:
ORA-06550: line 13, column 1:
PLS-00201: identifier 'SHOW_HEADER' must be declared
ORA-06550: line 13, column 1:
PL/SQL: Statement ignored
ORA-06550: line 29, column 14:
PLS-00201: identifier 'V2T' must be declared
ORA-06550: line 29, column 14:
PL/SQL: Item ignored
ORA-06550: line 30, column 14:
PLS-00201: identifier 'V2T' must be declared
ORA-06550: line 30, column 14:
PL/SQL: Item ignored
ORA-06550: line 54, column 3:
PLS-00201: identifier 'INSERT_HTML' must be declared
ORA-06550: line 54, column 3:
PL/SQL: Statement ignored
ORA-06550: line 58, column 3:
PLS-00201: identifier 'INSERT_HTML' must be declared
ORA-06550: line 58, column 3:
PL/SQL: Statement ignored
ORA-06550: line 61, column 45:
PLS-00201: identifier 'V2T' must be declared
ORA-06550: line 61, column 1:
PL/SQL: Item ignored
ORA-06550: line 86, column 6:
PL/SQL: ORA-00942: table or view does not exist
ORA-06550: line 84, column 1:
PL/SQL: SQL Statement ignored
ORA-06550: line 107, column 3:
PLS-00201: identifier 'ERRORPRINT' must be declared


Solution:

APlist.sql calls another file - CoreApiHtml.sql that comes with APlist script. Make sure that this file is in the same directory as APList.sql, it contains all the procedures that APList calls.