Error generating window.controlsMap

When generating add and list page of one of my tables i get this code:
add

<script>

window.controlsMap = ;

window.viewControlsMap = {"recetas":{"add":{"1":[]}}};

window.settings = .......

</script>
list

window.controlsMap = ;

window.viewControlsMap = {"recetas":{"list":{"1":{"mViewControlsMap":[]}}}};
In both cases it crashes the page with "Uncaught SyntaxError: Unexpected token ';'" when I debug the page with Chrome developers tools.

This code is generated by phprunner, not included as an event by me.
Any idea what could be the reason?
Thanks in advance!