fix: made some minor adjustments: added is_blocked

addons/Wol/Wol.gd

@@ -24,8 +24,6 @@ export var auto_substitute = true
 
 export(Dictionary) var variable_storage = {}
 
-var running = false
-
 const Constants = preload('res://addons/Wol/core/Constants.gd')
 const Compiler = preload('res://addons/Wol/core/compiler/Compiler.gd')
 const Library = preload('res://addons/Wol/core/Library.gd')
@@ -53,6 +51,7 @@ func set_path(_path):
 	path = _path
 
 	if not Engine.editor_hint and virtual_machine and not path.empty():
+		print('recompiling')
 		var compiler = Compiler.new(path)
 		virtual_machine.program = compiler.compile()
 
@@ -103,6 +102,9 @@ func select_option(id):
 func pause():
 	virtual_machine.call_deferred('pause')
 
+func is_blocked():
+	return virtual_machine.execution_state == Constants.ExecutionState.WaitingForOption
+
 func start(node = starting_node):
 	running = true
 	emit_signal('started')

addons/Wol/core/VirtualMachine.gd

@@ -156,6 +156,9 @@ func run_instruction(instruction):
 		Constants.ByteCode.RunLine:
 			# Lookup string and give back as line
 			var key = instruction.operands[0].value
+			if not program.strings.has(key):
+				printerr('Cant find line for "%s"' % key)
+				return
 			var line = program.strings[key].clone()
 
 			# The second operand is the expression count of format function