Oracle exception to find where procedure is crashing

I am trying to debug my procedure and I am getting the error

OTHERS Error Code -6502 Err Msg ORA-06502: PL/SQL: numeric or value error: character to number conversion error POL NBR = WC291645277 EFFDT = 01-MAR-14

I have so much going on that unless I step through the code I cant find exactly where its bombing. Is there anything I can do other then put a SYS.DBMS_OUTPUT.PUT_LINE everywhere to find out exactly what is going on? I understand that I have to be aware of what is being matched to each other when Im setting variables and everything but I was wondering if there is something like a call stack type of thing where I can find the line of code that is throwing the error? I know the basics and have been trying everything I can but I was curious if there is something I may be overlooking, like if I can somehow put the variable or field that is bombing in the Exception? In other words, if a line of code bombs and ends up in my WHEN OTHERS Exception, can I somehow code it to identify where the code is bombing? Im sure its somewhat of a longshot but I was curious if someone knows something I don't. I also don't have privs to debug in PROD and that's where its bombing. If can do it without the debugging privs and can get it into my Exception Id like to do that.

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slightwv (䄆 Netminder) Commented:
That looks like a customized error message.

Yes, there is a stack trace available but you need to code for it.  

Check out dbms_utility.format_error_stack and/or dbms_utility.format_error_backtrace

You have the proper POLNBR and Date.  Shouldn't be that difficult to track it down manually.  Look in the code where you convert a string to a number (either implicitly or explicitly).  Then query the data.

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jknj72Author Commented:
Its not difficult its just tedious. There are many things to check and I thought there may be an easier way to do it that's all.. Ill try out that function. It may be what I am looking for. Thanks

I forgot to add my Exception where the message is actually the ERR_MESSAGE with the POLNBR and Date concatenated in the OTHERS portion of the Exception.

                Insert Into PCOV_POLICY_MESSAGE_TAB(ERR_ID, ERR_MESSAGE, ERR_TIMESTAMP) Values  (i,'NO DATA FOUND ' || l_COV_polNbr || ' EFFDT = ' || l_COV_covEffDate ,SYSTIMESTAMP);
                i :=;
              WHEN OTHERS THEN
                  err_code := SQLCODE;
                  err_msg := SUBSTR(SQLERRM, 1, 2000);
                Insert Into PCOV_POLICY_MESSAGE_TAB(ERR_ID, ERR_MESSAGE, ERR_TIMESTAMP) Values  (i,'OTHERS Error Code ' || err_code  || ' Err Msg ' || err_msg  || ' POL NBR = ' || l_COV_polNbr || ' EFFDT = ' || l_COV_covEffDate ,SYSTIMESTAMP);
                i :=;
jknj72Author Commented:
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