Cancelling a Search in a merged RoboHTML project causes the brower to hang for subsequent searches

When we are running a search on a merged project, pressing Cancel to cancel the operation, followed by running a new search results in a Javascript error on both Firefox and IE (11).  In Firefox the response is to send the user an error message saying that the script is taking too long to run continue/cancel.  Continuing results in a loop-back to the error, eventually.  Cancel and reload filxes the issue.  On IE, it shows show as a hung browser.

Thoughts?

-m