Description:
When you export the process map created in Tibco Nimbus, the process shows the error "hexadecimal value 0x0C, is an invalid character".

Cause:
If text copied from outside of the Tibco Nimbus (From MS doc mostly). At the time of copying the text if page break is also copied will cause this issue.
Inside the map, it is shown as extra white space but page break is considered as a special character by the system.
Page break copied with the text which causes this issue can be at the end of the text, at the starting of the text, or in the middle of the text.
 
How to find out which space is page break:
To find out which activity text or commentary text containing the page break is
--Copy all the text of activity or commentary using ctrl+a -> ctrl+c
--Paste this text in notepad or Wordpad or any text tool.
--In the text tool, this page break is shown as an unknown special character