# OPC DA with schneider PLC but have ComSubscription error **URL:** \ **Category:** Ignition\ **Tags:** ignition79\ **Created:** [February 21, 2019, 10:17am UTC](https://forum.inductiveautomation.com/t/opc-da-with-schneider-plc-but-have-comsubscription-error/22751 "2019-02-21T10:17:53Z")\ **Posts on this page:** 2\ **Page:** 2
**Author:** ![zxcslo](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/zxcslo/32/61610_2.png) [@zxcslo](https://forum.inductiveautomation.com/u/zxcslo)\ **Post date:** [February 27, 2019, 10:03am UTC](https://forum.inductiveautomation.com/t/opc-da-with-schneider-plc-but-have-comsubscription-error/22751/21 "2019-02-27T10:03:22Z")
I found this: [https://www.schneider-electric.com/en/faqs/FA298805/](https://www.schneider-electric.com/en/faqs/FA298805/) ---
**Author:** ![jean.noel.dotter](https://avatars.discourse-cdn.com/v4/letter/j/c68b51/32.png) [@jean.noel.dotter](https://forum.inductiveautomation.com/u/jean.noel.dotter)\ **Post date:** [February 27, 2019, 10:19am UTC](https://forum.inductiveautomation.com/t/opc-da-with-schneider-plc-but-have-comsubscription-error/22751/22 "2019-02-27T10:19:06Z")
Hello All, I have solved my case: [https://docs.inductiveautomation.com/display/DOC79/OPC+COM#OPCCOM-IgnitionServerDCOMSettings](https://docs.inductiveautomation.com/display/DOC79/OPC+COM#OPCCOM-IgnitionServerDCOMSettings) point 4: 4.You can also try setting the Default Authentication Level to None and the Default Impersonation Level to Identify on the Default Properties tab. This isn’t always necessary but it can sometimes help. so on my computer it is: ![ignition27022019](https://us1.discourse-cdn.com/inductiveautomation/original/2X/f/fc7d1485d9ab700c3bde33d5d3cc679b820a1ff5.png) and now the value can be read. Thanks a lot for your help! [Previous page](https://forum.inductiveautomation.com/t/opc-da-with-schneider-plc-but-have-comsubscription-error/22751.md?page=1)