Between 2016-01-19 and today, 2016-01-22, my Developer Console stopped working in Spring 16, cs21.


  1. All menu items do not drop down to a list of actions (instead, empty dropdown)
  2. No tabs are refreshed with their prior state (logs, test results)
  3. Browser console shows Uncaught TypeError: b is not a function in ApexIDEPanels (see screen shot below)

To paraphrase Monty Python:

'E's not pinin'! 'E's passed on! This developer console is no more! He has ceased to be! 'E's expired and gone to meet 'is maker! 'E's a stiff! Bereft of life, 'e rests in peace!


  1. Occurs on all browsers - Chrome-Firefox-Safari-Opera
  2. Others in my org do not experience this issue
  3. Is not browser-related because I can log into my org from others' computers who have a working/functional DC, yet when I use their computers with my login ID, I get the same failure. Additionally, I installed Opera just today to rule out cookies or any browser state. Browser Refresh Hard does not help. DC works fine for me in a different Spring 16 org on the same computer (cs11)

This leads me to conclude that the current state of my logs, query results and testresults causes DC to blow up whereas other user's logs/testresults/queryresults don't have such pernicious effect.

I can't delete the ApexLogs from the DC as the 'Use Tooling API' checkbox doesn't display. Using Workbench to delete ApexLog and ApexTestResult has yet to bear fruit.

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1 Answer 1


Ah, spring time! By doing nothing between Friday and Monday, the problem went away. No uncaught exceptions in the browser console. I can only conclude that either

  1. The DC state ages away and hence the problem self-corrects. None of my log tabs were shown when I opened the DC on Monday.
  2. SFDC fixed something in Spring 16 over the weekend

Update - problem recurred (late March 2016), some additional solutions:

  1. SFDC Help article on correcting invalid workspace.
  2. I had multiple open DC windows (all expired, for three orgs, all in Chrome, one with a pending Test Suite dialog confirmation). I closed all of them and problem went away.
  • I don't think this is fixed. I'm experiencing it right now on CS21. Jan 29, 2016 at 17:58
  • I am sorry to hear that - you get the same Console error that I included in the OP? The only workaround I could come up with was to create a new user and continue development that way
    – cropredy
    Jan 29, 2016 at 18:32
  • 1
    @frontendloader - see update
    – cropredy
    Mar 24, 2016 at 18:25

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