How to interrupt script when the condition is false

[Daniel.Snyder]

If I'm understanding your case correctly, this is might be because time.sleep() freezes the user interface for the duration of the delay. So when you set your condition to false elsewhere on the view it doesn't actually update the script until sleep() is done.

Regardless, using time.sleep() is incredibly bad practice for many reasons:

Time.sleep function in Ignition

[quote=“dlaki”]Anyone here have tried to to use time.sleep function of time module in Ignition?[/quote]Nick hints at this, but let me be more explicit: Never, ever, use time.sleep or any other delay function in Ignition unless it is on its own asynchronous thread. Delays on the event dispatch thread (darn near everything in a client) will freeze the user interface for the duration of the delay. Just say no to any form of sleep. When you need delays, always use system.util.invokeLater() with …

Perspective, time.sleep vs later.py

time.sleep should be avoided in basically every scenario - the only exception I would maybe give is a dedicated thread spawned by invokeAsynchronous. later.py technically hooks into an internal class, but the signature of that class is pretty unlikely to change, and, crucially, it does not require a thread to be kept sleeping.