Process Flow Error: nonexistent LOB value

Question

Hi,
I would like to send an email of all mapping statuses of the day. I created function to retrieve all messages from OWB$WB_RT_AUDIT_MESSAGE_LINES. Sometimes it works and another time it fails. After a little investigation I got the cause of this failure: length of the message exceed the limitation of VARCHAR2 (4000 bytes).
Then I created another function for testing as follows:
CREATE OR REPLACE FUNCTION FTEST_VAR RETURN CLOB IS
tmpVar CLOB;
BEGIN
tmpVar := 'test';
RETURN tmpVar;
END FTEST_VAR;
From SQLPlus I was able to query this function:
SQL>select ftest_var tst from dual;
TST
test
Then I created a process flow like this:
START1->FTEST_VAR->EMAIL->END_SUCCESS
In the process flow I created a variable EMAILBODY to bind to the output of FTEST_VAR and then bind EMAILBODY to the MESSAGE_BODY of the EMAIL.
I deployed and run the process flow. It failed with this error message:
ORA-22922: nonexistent LOB value
ORA-06512: at line 1                                        
Could anybody please shed a light on this?
TIA
Prat

Answer 1

I am trying to setup pretty much the same type of flow to email job messages using a CLOB.  Were you able to find a solution?
Thanks!