I have an HTML view that has the Header option enabled for PDF and PRINT. The buttons that appear on the view worked originally, but suddenly they are not working now. When the buttons are clicked on a blank window opens up, but no PDF or Print functions.

The opening lines of code in my html view are:
htmlpage Screen_Printing_Invoice(recordID)
displayname = "Screen Printing Invoice"
print = true
pdf = true
content
<%{%>
The page source for the html view has this code for the implementation of the functions:
<td class="zc-formbutton" style='cursor:pointer;' onclick="ZCView.printView('Screen_Printing_Invoice','recordID%3D340313000001513923')" >Print</td>
<td class="zc-formbutton" style='cursor:pointer;' onclick="ZCView.pdfView('Screen_Printing_Invoice','recordID%3D340313000001513923')" >PDF</td>
But, clicking on either button pops-up a blank browser window with no code in it. The odd thing is, it used to work in this view.
Please advise.
Greg Malone
Santa Fe, New Mexico, US