Hi Mario,

The last line of the that script restores the default styles. Append your favorite style script to the end of the purge script.
I did not consider duplicate styles being created. No coffee so far this morning.

Wayne

Example:

// Purge unused styles and append 100 styles to list.

script: var gd = moi.geometryDatabase;
var styles = gd.getObjectStyles();
var counts = new Array(styles.length);
for (var i = 0; i < counts.length; ++i) {
	counts[i] = 0;
}
var objs = gd.getObjects();
for (var i = 0; i < objs.length; ++i) {
	var obj = objs.item(i);
	if (obj.styleIndex < counts.length) ++counts[obj.styleIndex];
	var subobjs = obj.getSubObjects();
	for (var j = 0; j < subobjs.length; ++j) {
		var subobj = subobjs.item(j);
		if (subobj.styleIndex < counts.length) ++counts[subobj.styleIndex];
	}
}
for (var i = 0; i < styles.length; ++i) {
	if (counts[i] == 0) styles.item(i).remove();
}

// Restore default styles:
moi.geometryDatabase.addDefaultStyles();

// append 100 styles to listing
script: /* Make gradient styles */ var red = 12,
	green = 15,
	blue = 20;
for (var i = 1; i <= 100; ++i) {
	var style = moi.geometryDatabase.addStyle();
	style.name = 'Gradient ' + i;
	style.color = ((red % 256) << 16) | ((green % 256) << 8) | (blue % 256);
	red += 2;
	green += 3;
	blue += 7;
}