SQL & PL/SQL :: Invalid Identifier?

I am trying to do an update with an anonymous PL/SQL block because it has been absolutely impossible to get by the infamous "Single-row subquery returns multiple rows" Whatever.So this code below work... Obviously, I am updating it to a constant.. OK, duh.. Of course it works, it's easy.... Now, I really need to update it to a value in another table that is in my cursor. I believe that I probably need to declare a secondary cursor.

I'm just getting back in the DBA saddle, so I'm a little rusty..

set serveroutput on;
DECLARE
numrows NUMBER := 0;
total NUMBER := 0;
CURSOR upd_record_cur IS SELECT m.rowid, m.swcm_cycle, t.newcycle, p.aprem_no from toad.fswcmas m,

[code]...

Not so good here

ORA-06550: line 20, column 53:
PL/SQL: ORA-00904: "TOAD"."TTP43425_LOAD"."NEWCYCLE": invalid identifier
ORA-06550: line 20, column 10:
PL/SQL: SQL Statement ignored

Doesn't work...
BEGIN
FOR upd_rec IN upd_record_cur LOOP
update toad.fswcmas sw set sw.swcm_cycle = toad.ttp43425_load.newcycle
WHERE rowid = upd_rec.rowid;
total := total + 1;