Continue checking the issue of communication error. Message Nate to ask questions and forwarded the screenshot, as per Nate the IP address is 172.16.1.19 is why the app is unable to connect to JDA. Asked the Infra team particularly Arnel as he is the AS400 Administrator but didn't get a firm answer at first but he still answers my question. What I did is to change the 1.19 to 211.23 and I was able to receive the TL. But there are new reports that they are unable to process in the web portal. I'm not sure I need to change all the IP addresses in the config. I will ask Jovie on Monday as she is still on leave today.