I reset the line limit on the Kile setting and tried to reopen without success. It happens that the kilerc file ($HOME/.kde4/share/config) keeps a record of all files ever opened and a ReadWrite=true/false variable.The file contains lines longer than current line limit: 1024. Set status to readonly.
By editing this file manually and changing the variable ReadWrite to true the problem was corrected.
Question: Is there a way to change the status of the variable from within the Kile application?