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  • $\begingroup$ Declare Global`x1 in between BeginPackage[] and Begin[], and try again. $\endgroup$ Commented May 10, 2016 at 10:13
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    $\begingroup$ @SimonRochester while linked topic is older I'd make it a duplicate of this one. It is because the answer here is more general. Sorry but your solution requires to clear the kernel, before loading a package, to avoid shadowing problems with all exported dummy symbols (here x). Not to mention that if two packages export x the shadowing will be unavoidable. $\endgroup$ Commented Dec 22, 2016 at 10:45
  • $\begingroup$ @Kuba I am inclined to agree, but I never like closing older questions as duplicates of newer ones. That doesn't mean I won't do or allow it, it's just how I feel about it. One alternative that comes to mind is to merge these questions which would move your more general answer to the older question; this would "cost" you an Accept but it would juxtapose your method and caveats with the seemingly simpler approach shown in Simon's answer. $\endgroup$ Commented Dec 22, 2016 at 17:13
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    $\begingroup$ @Mr.Wizard I'm fine with that, feel free to merge :) $\endgroup$ Commented Dec 22, 2016 at 17:37
  • $\begingroup$ @Kuba I will wait 24 hours in case anyone has an objection or wishes to reopen this question as a Merge is impossible to reverse without SE developer intervention. (please remind me if I forget) $\endgroup$ Commented Dec 22, 2016 at 17:38