Re: LTI Canvas to Webwork Use of uninitialized value in string - LTIAdvanced.pm line 731. by John Eismeier - Thursday, 12 May 2022, 7:43 AM Number of replies: 0 Yes, we are using WeBWork 2.16. I upgraded from 2.15 last October. I haven't pulled any code changes since then. Permalink Show parent Reply