Index: ps/trunk/binaries/data/mods/public/simulation/components/Researcher.js
===================================================================
--- ps/trunk/binaries/data/mods/public/simulation/components/Researcher.js
+++ ps/trunk/binaries/data/mods/public/simulation/components/Researcher.js
@@ -143,7 +143,7 @@
 {
 	return {
 		"technologyTemplate": this.templateName,
-		"progress": 1 - (this.timeRemaining / this.timeTotal),
+		"progress": 1 - (this.timeRemaining / (this.timeTotal || 1)),
 		"timeRemaining": this.timeRemaining,
 		"paused": this.paused,
 		"metadata": this.metadata
Index: ps/trunk/binaries/data/mods/public/simulation/components/Trainer.js
===================================================================
--- ps/trunk/binaries/data/mods/public/simulation/components/Trainer.js
+++ ps/trunk/binaries/data/mods/public/simulation/components/Trainer.js
@@ -365,7 +365,7 @@
 		"unitTemplate": this.templateName,
 		"count": this.count,
 		"neededSlots": this.missingPopSpace,
-		"progress": 1 - (this.timeRemaining / this.timeTotal),
+		"progress": 1 - (this.timeRemaining / (this.timeTotal || 1)),
 		"timeRemaining": this.timeRemaining,
 		"paused": this.paused,
 		"metadata": this.metadata