# Functionality problem

**URL:** <https://discourse.nodered.org/t/functionality-problem/9990>\
**Category:** General\
**Created:** [10 April 2019 13:55 UTC](https://discourse.nodered.org/t/functionality-problem/9990 "2019-04-10T13:55:35Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![ihebabidi](https://avatars.discourse-cdn.com/v4/letter/i/e47c2d/32.png) [@ihebabidi](https://discourse.nodered.org/u/ihebabidi)\
**Post date:** [10 April 2019 13:55 UTC](https://discourse.nodered.org/t/functionality-problem/9990/1 "2019-04-10T13:55:35Z")

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hello all !  
im using two flows, im using a modbus tcp node to get DATA from a PLC in the first one and an SNMP node to get data from a sensor in the second one,each one works if disable the other,when i deploy them together none of them works..  
any ideas please?

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**Author:** ![Steve-Mcl](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/steve-mcl/32/4826_2.png) [@Steve-Mcl](https://discourse.nodered.org/u/Steve-Mcl)\
**Post date:** [10 April 2019 14:12 UTC](https://discourse.nodered.org/t/functionality-problem/9990/2 "2019-04-10T14:12:07Z")

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You gave so little to go on! No flow. no screen shots. no version numbers. no NODE library names.

Anyhow - I'll have a punt...  
Are you using global variables? Perhaps you are overwriting them?

If you want further help, try exporting (CTRL+E) your flow and posting it (between ticks ```` ````) for people to have a look & see if they can spot your problem.

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**Author:** ![Colin](https://sea2.discourse-cdn.com/flex026/user_avatar/discourse.nodered.org/colin/32/17040_2.png) [@Colin](https://discourse.nodered.org/u/Colin)\
**Post date:** [10 April 2019 14:41 UTC](https://discourse.nodered.org/t/functionality-problem/9990/3 "2019-04-10T14:41:37Z")

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What exactly do you mean by disabling? are you disconnecting them or just not deploying nodes that use them?  
With both of them enabled, in a terminal run

```bash
node-red-stop
node-red-start

```

and copy/paste the result here.