selenium rc killing firefox at random points for no reason

I'm running test using behat, but this basically runs phpunits selenium driver, to do integration tests

everything was working fine but for no apparent reason firefox quits at some point in the middle of my test suite the seleni开发者_运维知识库um rc log looks like this

09:23:53.157 INFO - Command request: setTimeout[30000, ] on session 62b513ea550a419898a79f912beecc69
09:23:53.180 INFO - Got result: OK on session 62b513ea550a419898a79f912beecc69
09:23:53.263 INFO - Command request: open[/request/step1, ] on session 62b513ea550a419898a79f912beecc69
09:23:53.318 INFO - Got result: XHR ERROR: URL = http://local-test.account/request/step1 Response_Code = -1 Error_Message = Request Error on session 62b513ea550a419898a79f912beecc69
09:23:53.321 INFO - Command request: testComplete[, ] on session 62b513ea550a419898a79f912beecc69
09:23:53.321 INFO - Killing Firefox...
09:23:53.356 INFO - Got result: OK on session 62b513ea550a419898a79f912beecc69
09:23:53.371 INFO - Command request: open[/request/step1, ] on session null
09:23:53.374 ERROR - Exception running 'open 'command on session null

at what point in the test it quits doesn't seem to follow any pattern.

i've tried rolling my projects code back to before I was having problems but to no avail

If you are using Selenium 1.3, try upgrading to Selenium 2.0. Here is how I resolved my problem with selenium.open();

This is possible when you are not passing correct website address. What are you passing, what is the URL of your website.