11 files changed, 71 insertions, 1 deletions
diff --git a/bin/ai/compat_0.7.nut b/bin/ai/compat_0.7.nut
index 98c03c673..86ab06bba 100644
--- a/bin/ai/compat_0.7.nut
+++ b/bin/ai/compat_0.7.nut
@@ -374,3 +374,10 @@ AIBridge.GetName <- function(bridge_id)
 {
 	return AIBridge._GetName(bridge_id, AIVehicle.VT_RAIL);
 }
+
+/* 1.9 adds parent_group_id to CreateGroup function */
+AIGroup._CreateGroup <- AIGroup.CreateGroup;
+AIGroup.CreateGroup <- function(vehicle_type)
+{
+	return AIGroup._CreateGroup(vehicle_type, AIGroup.GROUP_INVALID);
+}
diff --git a/bin/ai/compat_1.0.nut b/bin/ai/compat_1.0.nut
index 627c949cc..6aa0e1a97 100644
--- a/bin/ai/compat_1.0.nut
+++ b/bin/ai/compat_1.0.nut
@@ -126,3 +126,10 @@ AIBridge.GetName <- function(bridge_id)
 {
 	return AIBridge._GetName(bridge_id, AIVehicle.VT_RAIL);
 }
+
+/* 1.9 adds parent_group_id to CreateGroup function */
+AIGroup._CreateGroup <- AIGroup.CreateGroup;
+AIGroup.CreateGroup <- function(vehicle_type)
+{
+	return AIGroup._CreateGroup(vehicle_type, AIGroup.GROUP_INVALID);
+}
diff --git a/bin/ai/compat_1.1.nut b/bin/ai/compat_1.1.nut
index a47f3d5b1..3d7b7553e 100644
--- a/bin/ai/compat_1.1.nut
+++ b/bin/ai/compat_1.1.nut
@@ -63,3 +63,10 @@ AIBridge.GetName <- function(bridge_id)
 {
 	return AIBridge._GetName(bridge_id, AIVehicle.VT_RAIL);
 }
+
+/* 1.9 adds parent_group_id to CreateGroup function */
+AIGroup._CreateGroup <- AIGroup.CreateGroup;
+AIGroup.CreateGroup <- function(vehicle_type)
+{
+	return AIGroup._CreateGroup(vehicle_type, AIGroup.GROUP_INVALID);
+}
diff --git a/bin/ai/compat_1.2.nut b/bin/ai/compat_1.2.nut
index 95ccabda2..594ba9835 100644
--- a/bin/ai/compat_1.2.nut
+++ b/bin/ai/compat_1.2.nut
@@ -15,3 +15,10 @@ AIBridge.GetName <- function(bridge_id)
 {
 	return AIBridge._GetName(bridge_id, AIVehicle.VT_RAIL);
 }
+
+/* 1.9 adds parent_group_id to CreateGroup function */
+AIGroup._CreateGroup <- AIGroup.CreateGroup;
+AIGroup.CreateGroup <- function(vehicle_type)
+{
+	return AIGroup._CreateGroup(vehicle_type, AIGroup.GROUP_INVALID);
+}
diff --git a/bin/ai/compat_1.3.nut b/bin/ai/compat_1.3.nut
index fc8e06bf5..fb0f41d30 100644
--- a/bin/ai/compat_1.3.nut
+++ b/bin/ai/compat_1.3.nut
@@ -15,3 +15,10 @@ AIBridge.GetName <- function(bridge_id)
 {
 	return AIBridge._GetName(bridge_id, AIVehicle.VT_RAIL);
 }
+
+/* 1.9 adds parent_group_id to CreateGroup function */
+AIGroup._CreateGroup <- AIGroup.CreateGroup;
+AIGroup.CreateGroup <- function(vehicle_type)
+{
+	return AIGroup._CreateGroup(vehicle_type, AIGroup.GROUP_INVALID);
+}
diff --git a/bin/ai/compat_1.4.nut b/bin/ai/compat_1.4.nut
index 169ead959..4bbb97160 100644
--- a/bin/ai/compat_1.4.nut
+++ b/bin/ai/compat_1.4.nut
@@ -15,3 +15,10 @@ AIBridge.GetName <- function(bridge_id)
 {
 	return AIBridge._GetName(bridge_id, AIVehicle.VT_RAIL);
 }
+
+/* 1.9 adds parent_group_id to CreateGroup function */
+AIGroup._CreateGroup <- AIGroup.CreateGroup;
+AIGroup.CreateGroup <- function(vehicle_type)
+{
+	return AIGroup._CreateGroup(vehicle_type, AIGroup.GROUP_INVALID);
+}
diff --git a/bin/ai/compat_1.5.nut b/bin/ai/compat_1.5.nut
index 681a708be..b006f1733 100644
--- a/bin/ai/compat_1.5.nut
+++ b/bin/ai/compat_1.5.nut
@@ -15,3 +15,10 @@ AIBridge.GetName <- function(bridge_id)
 {
 	return AIBridge._GetName(bridge_id, AIVehicle.VT_RAIL);
 }
+
+/* 1.9 adds parent_group_id to CreateGroup function */
+AIGroup._CreateGroup <- AIGroup.CreateGroup;
+AIGroup.CreateGroup <- function(vehicle_type)
+{
+	return AIGroup._CreateGroup(vehicle_type, AIGroup.GROUP_INVALID);
+}
diff --git a/bin/ai/compat_1.6.nut b/bin/ai/compat_1.6.nut
index 5242821d1..e57a3cb98 100644
--- a/bin/ai/compat_1.6.nut
+++ b/bin/ai/compat_1.6.nut
@@ -15,3 +15,10 @@ AIBridge.GetName <- function(bridge_id)
 {
 	return AIBridge._GetName(bridge_id, AIVehicle.VT_RAIL);
 }
+
+/* 1.9 adds parent_group_id to CreateGroup function */
+AIGroup._CreateGroup <- AIGroup.CreateGroup;
+AIGroup.CreateGroup <- function(vehicle_type)
+{
+	return AIGroup._CreateGroup(vehicle_type, AIGroup.GROUP_INVALID);
+}
diff --git a/bin/ai/compat_1.7.nut b/bin/ai/compat_1.7.nut
index 93884e663..ae403d104 100644
--- a/bin/ai/compat_1.7.nut
+++ b/bin/ai/compat_1.7.nut
@@ -15,3 +15,10 @@ AIBridge.GetName <- function(bridge_id)
 {
 	return AIBridge._GetName(bridge_id, AIVehicle.VT_RAIL);
 }
+
+/* 1.9 adds parent_group_id to CreateGroup function */
+AIGroup._CreateGroup <- AIGroup.CreateGroup;
+AIGroup.CreateGroup <- function(vehicle_type)
+{
+	return AIGroup._CreateGroup(vehicle_type, AIGroup.GROUP_INVALID);
+}
diff --git a/bin/ai/compat_1.8.nut b/bin/ai/compat_1.8.nut
index f3fa1bc0a..ecf4accdd 100644
--- a/bin/ai/compat_1.8.nut
+++ b/bin/ai/compat_1.8.nut
@@ -15,3 +15,10 @@ AIBridge.GetName <- function(bridge_id)
 {
 	return AIBridge._GetName(bridge_id, AIVehicle.VT_RAIL);
 }
+
+/* 1.9 adds parent_group_id to CreateGroup function */
+AIGroup._CreateGroup <- AIGroup.CreateGroup;
+AIGroup.CreateGroup <- function(vehicle_type)
+{
+	return AIGroup._CreateGroup(vehicle_type, AIGroup.GROUP_INVALID);
+}
diff --git a/bin/ai/regression/tst_regression/main.nut b/bin/ai/regression/tst_regression/main.nut
index 8b92b6f88..7315f33f8 100644
--- a/bin/ai/regression/tst_regression/main.nut
+++ b/bin/ai/regression/tst_regression/main.nut
@@ -574,7 +574,7 @@ function Regression::Group()
 	local vehicle = AIVehicle.BuildVehicle(10000, 116);
 	print("  AIVehicle.BuildVehicle(): " + vehicle);
 	print("  GetNumEngines():          " + AIGroup.GetNumEngines(AIGroup.GROUP_ALL, 116));
-	local group = AIGroup.CreateGroup(AIVehicle.VT_ROAD);
+	local group = AIGroup.CreateGroup(AIVehicle.VT_ROAD, AIGroup.GROUP_INVALID);
 	print("  CreateGroup():            " + group);
 	print("  MoveVehicle():            " + AIGroup.MoveVehicle(group, vehicle));
 	print("  GetNumEngines():          " + AIGroup.GetNumEngines(group, 116));