I am a US citizen. I recently applied for (and was granted) a multiple-entry 6-month Canadian business visa. It looks likely now that I will not use it (the trips were cancelled for business reasons), but I wondered - will this have any repercussions on future travel to Canada or elsewhere? I can provide a reasonable explanation for why I never used it, of course - will that even be needed if I apply to visit Canada again (as a tourist or for business)?