Error frm-40735 ora-01403

Question

I read that this is a general purpose error for Forms, but I couldn't find an answer for my situation. I have a datablock based on a view, and a command button that has a trigger for selecting values into the block where one of the blocks fields matches those records. Here is the pl/sql code for the button's when-button-pressed trigger:
BEGIN
SELECT VIEW.ATTRIBUTE1, VIEW.ATTRIBUTE2
INTO :DATABLOCK.TEXTFIELD1, :DATABLOCK.TEXTFIELD2
FROM VIEW
WHERE :DATABLOCK.TEXTFIELD = VIEW.ATTRIBUTE3;
END;
When I try to run this in Forms, I get the Error frm-40735 ora-01403. I can run similar code from SQL Plus. I would really appreciate some help.
regards

Answer 1

Let me give a better example: If I have two tables:
create table dept (
dept_no NUMBER,
dept_name VARCHAR2(10),
CONSTRAINT dept_pk PRIMARY KEY (dept_no)
create table Location (
loc_no NUMBER,
loc_name VARCHAR2(10),
dept_no NUMBER,
CONSTRAINT loc_pk PRIMARY KEY (loc_no),
CONSTRAINT loc_fk FOREIGN KEY (dept_no)
REFERENCES dept(dept_no)
and I create a master-detail form between the two. If I try to search by the loc_name, with the two tables joined by the master-detail, and have a trigger on a command button with the code:
BEGIN
SELECT d.dept_no, d.dept_name
INTO :DEPARTMENT.DEPT_NO, :DEPARTMENT.DEPT_NAME
FROM Location l, Dept d
WHERE :LOCATION.LOC_NAME = l.loc_name;
END;
why do I encounter the error?