Index: binaries/data/mods/public/simulation/components/Formation.js
===================================================================
--- binaries/data/mods/public/simulation/components/Formation.js
+++ binaries/data/mods/public/simulation/components/Formation.js
@@ -901,10 +901,13 @@
  */
 Formation.prototype.ComputeMotionParameters = function()
 {
+	if (!this.members.length)
+		return;
+
 	let minSpeed = Infinity;
 	let minAcceleration = Infinity;
 	let maxClearance = 0;
-	let maxPassClass;
+	let maxPassClass = "default";
 
 	const cmpPathfinder = Engine.QueryInterface(SYSTEM_ENTITY, IID_Pathfinder);
 	for (let ent of this.members)