diff --git a/src/main/java/org/ultramine/commands/basic/TechCommands.java b/src/main/java/org/ultramine/commands/basic/TechCommands.java
index 42dfced..c867ea3 100644
--- a/src/main/java/org/ultramine/commands/basic/TechCommands.java
+++ b/src/main/java/org/ultramine/commands/basic/TechCommands.java
@@ -412,13 +412,17 @@
 		if(worldgen != null)
 			ctx.failure("command.genworld.already");
 		
-		int dim = ctx.getSenderAsPlayer().worldObj.provider.dimensionId;
+		WorldServer world = ctx.getSenderAsPlayer().getServerForPlayer();
+		int dim = world.provider.dimensionId;
 		int radius = ctx.contains("radius") ? ctx.get("radius").asInt(1) : -1;
 		int cpt = ctx.contains("radius") ? ctx.get("radius").asInt(1) : 1;
 		
 		int x = MathHelper.floor_double(ctx.getSenderAsPlayer().posX);
 		int z = MathHelper.floor_double(ctx.getSenderAsPlayer().posZ);
 		
+		if(radius == -1 && world.getConfig().borders.length == 0)
+			ctx.failure("command.genworld.noborder");
+		
 		worldgen = radius == -1 ? new WorldGenerator(dim, cpt) : new WorldGenerator(dim, x, z, radius, cpt);
 		FMLCommonHandler.instance().bus().register(worldgen);
 		ctx.sendMessage("command.genworld.start");
@@ -515,7 +519,7 @@
 				}
 				
 				totalGenerated += counter;
-				if(totalGenerated % 600*chunksPerTick == 0)
+				if(totalGenerated % (600*chunksPerTick) == 0)
 					MinecraftServer.getServer().getConfigurationManager().sendChatMsg(new ChatComponentTranslation("command.genworld.process", totalGenerated));
 				
 				if(borderInd >= (isBorder ? borders.length : 1))
diff --git a/src/main/resources/assets/ultramine/lang/en_US.lang b/src/main/resources/assets/ultramine/lang/en_US.lang
index c7087ee..797237f 100644
--- a/src/main/resources/assets/ultramine/lang/en_US.lang
+++ b/src/main/resources/assets/ultramine/lang/en_US.lang
@@ -198,6 +198,7 @@
 command.genworld.usage=/genworld [chunks per tick] OR /genworld <RADIUS> <radius> [chunks per tick] OR /genworld stop
 command.genworld.description=Generateas area radially or inside world border
 command.genworld.already=World is now generating. Type "/genworld stop" before
+command.genworld.noborder=The world don't contains any borders; add border or use radially generation
 command.genworld.start=World generation started
 command.genworld.stop=World generation stopped
 command.genworld.complete=World generation completed (generated %s chunks)
diff --git a/src/main/resources/assets/ultramine/lang/ru_RU.lang b/src/main/resources/assets/ultramine/lang/ru_RU.lang
index 0819985..b390fc8 100644
--- a/src/main/resources/assets/ultramine/lang/ru_RU.lang
+++ b/src/main/resources/assets/ultramine/lang/ru_RU.lang
@@ -198,6 +198,7 @@
 command.genworld.usage=/genworld [чанков за тик] ИЛИ /genworld <RADIUS> <радиус> [чанков за тик] ИЛИ /genworld stop
 command.genworld.description=Генерирует мир по радиусу или в пределах мирового барьера
 command.genworld.already=Генерауия мира уже запущена. Сначала введите "/genworld stop"
+command.genworld.noborder=Мир не содержит барьера; добавьте барьер или используйте генерацию по радиусу
 command.genworld.start=Генерация мира остановлена запущена
 command.genworld.stop=Генерация мира остановлена
 command.genworld.complete=Генерация мира завершена (сгенерировано %s чанков)