# OPC UA connection timeout/error | catch node

**URL:** <https://discourse.nodered.org/t/opc-ua-connection-timeout-error-catch-node/62511>\
**Category:** General\
**Created:** [11 May 2022 14:11 UTC](https://discourse.nodered.org/t/opc-ua-connection-timeout-error-catch-node/62511 "2022-05-11T14:11:49Z")\
**Posts on this page:** 1\
**Showing post:** 3

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**Author:** ![learnobyte](https://avatars.discourse-cdn.com/v4/letter/l/d6d6ee/32.png) [@learnobyte](https://discourse.nodered.org/u/learnobyte)\
**Post date:** [11 May 2022 14:29 UTC](https://discourse.nodered.org/t/opc-ua-connection-timeout-error-catch-node/62511/3 "2022-05-11T14:29:06Z")

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Hi steve,

The two huge functions are subscribing 42 items/datapoint items from opc ua server.I don't know how to read multiple items from the server and get multiple payloads. I got the reference from the forum.just tried.

> [@OPC UA Client Node - subscription limitation](https://discourse.nodered.org/t/opc-ua-client-node-subscription-limitation/62340):
>
> Hi all, I am using OPC UA client node to subscribe data points, Is there any limitation in terms number of client nodes. I have used 24 nodes, after that if I add nodes again, shows only subscription id, and payload, some number, but no data. If I disable 2 or 3 nodes, showing data Before disabling nodes: After disabling 3 nodes: I am getting payload, working fine Is there any limitation/maximum for subscription points , like 25 datapoints

I posted in the forum before I used multiple clients to read each item, but there is a limitation of only 24 nodes, after that not able to subscribe.

 ![image](https://us1.discourse-cdn.com/flex026/uploads/nodered/original/3X/6/5/65ffe43b85cc25a38ef94b102165e61c276f3efd.png)

how to use the status node?

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