As by released The Friends of Dan Miler campaign:

I am disappointed in Harrisburg Hope's decision to schedule its mayoral debate for April 11th despite being fully aware I would not be available to participate until the following week. Unfortunately, my offer to send a representative was rejected, as well. I explained to the organizers of the debate, I have an obligation as an accountant that peaks on April 15th and therefore must focus on my responsibility to my clients. I recently released a schedule of the debates in which I'll participate and look forward to explaining my positions on important issues.