I'm trying to install an existing custom report on another DMA.
The asp code has following function

var dvmsname = "DVB_RS_MAS1_BTZ";
var filter2 = new Array("value=4098 == 0.0.0.0.5.1.1");

var DVB4050Data = DMS_getTableFiltered(dvmsname, 4050,filter2);

var info = getAt(DVB4050Data, 0);
var rows = info[0];
var columns = info[3];

When I try following it fails:
Response.Write('<p> '+ DVB4050Data.length + '</p>');

Is there any documentation on this DMS_getTableFiltered function?
Since it's legacy code, is there any way to debug it?