# OPC-DA & Rslinx Classic Lite

**URL:** <https://forum.inductiveautomation.com/t/opc-da-rslinx-classic-lite/30761>\
**Category:** General Discussion\
**Created:** [December 17, 2019, 11:50am UTC](https://forum.inductiveautomation.com/t/opc-da-rslinx-classic-lite/30761 "2019-12-17T11:50:47Z")\
**Posts on this page:** 3\
**Page:** 1

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**Author:** ![HALW80](https://avatars.discourse-cdn.com/v4/letter/h/47e85d/32.png) [@HALW80](https://forum.inductiveautomation.com/u/HALW80)\
**Post date:** [December 17, 2019, 11:50am UTC](https://forum.inductiveautomation.com/t/opc-da-rslinx-classic-lite/30761/1 "2019-12-17T11:50:47Z")

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I had OPC-DA & Rslinx Classic Lite running for a week and it has now stopped.  
Can RSlinx Classic Lite be used (possibly was in grace mode for the week) or do I have to use Rslinx Pro or Gateway and license RSLinx

Getting the following error:  
com.jniwrapper.win32.com.ComException: COM object method returns error code: 0x80040112; CLASS\_E\_NOTLICENSED (Class is not licensed for use)

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**Author:** ![pturmel](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/pturmel/32/3295_2.png) [@pturmel](https://forum.inductiveautomation.com/u/pturmel)\
**Post date:** [December 17, 2019, 12:02pm UTC](https://forum.inductiveautomation.com/t/opc-da-rslinx-classic-lite/30761/2 "2019-12-17T12:02:39Z")

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The unlicensed “Lite” version only works with Rockwell’s own products. For third party connections, you need to buy a license.

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**Author:** ![HALW80](https://avatars.discourse-cdn.com/v4/letter/h/47e85d/32.png) [@HALW80](https://forum.inductiveautomation.com/u/HALW80)\
**Post date:** [December 17, 2019, 12:05pm UTC](https://forum.inductiveautomation.com/t/opc-da-rslinx-classic-lite/30761/3 "2019-12-17T12:05:33Z")

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Thank you for the swift reply