Unable to insert XML in CLOB (for Long Lived Processes)

Question

I am trying to insert XML/XDP in a CLOB column of an Oracle Database. It seems to work in a short lived process. However, I get all sorts of errors when I convert it to long lived.
Anyway one know why?
I extract the XML/XDP using a process form submission module and convert it to string. Then, I run the insert through a custom script as setString.
Aditya

Answer 1

This has been an issue in the past. When I try to change the string size to unlimited, it doesn't allow me to save the process. However, when I create a new string variable and assign it to unlimited, it worked.
I am thinking, when the string variable is saved the first time with a limit or a lower limit, it saves it to a Varchar2 and it is unable to change to a different column type when a higher char limit or unlimited it set. Don't you think this is a serious issue in existing processes with lower limits on string variables. Do you know a stable work around?
Also, how can I get value from an XML variable, using a custom script? "patExecContext.getProcessDataValue" doesn't work.
Aditya