# OPCUA/Modbus TCP tag Write error **URL:** \ **Category:** Ignition\ **Created:** [April 10, 2021, 4:42pm UTC](https://forum.inductiveautomation.com/t/opcua-modbus-tcp-tag-write-error/45457 "2021-04-10T16:42:01Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![rajeshbabu](https://avatars.discourse-cdn.com/v4/letter/r/35a633/32.png) [@rajeshbabu](https://forum.inductiveautomation.com/u/rajeshbabu)\ **Post date:** [April 10, 2021, 4:42pm UTC](https://forum.inductiveautomation.com/t/opcua-modbus-tcp-tag-write-error/45457/1 "2021-04-10T16:42:01Z")
We are interfacing with Weidmuller I/O’s and Mitsubishi GOC43 on Modbus TCP. In both cases, when we attempt to write tags, the first tag gets through and subsequently we get write errors. Wonder if is a known problem and if yes what are the recommended corrective actions. Matter most urgent. ---
**Author:** ![Kevin.Herron](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/kevin.herron/32/7259_2.png) [@Kevin.Herron](https://forum.inductiveautomation.com/u/Kevin.Herron)\ **Post date:** [April 10, 2021, 6:12pm UTC](https://forum.inductiveautomation.com/t/opcua-modbus-tcp-tag-write-error/45457/2 "2021-04-10T18:12:15Z")
Can you provide more information? What version of Ignition are you using? How are you initiating the write? Do you have logs? Wireshark capture? ---
**Author:** ![rajeshbabu](https://avatars.discourse-cdn.com/v4/letter/r/35a633/32.png) [@rajeshbabu](https://forum.inductiveautomation.com/u/rajeshbabu)\ **Post date:** [April 11, 2021, 7:46am UTC](https://forum.inductiveautomation.com/t/opcua-modbus-tcp-tag-write-error/45457/3 "2021-04-11T07:46:46Z")
[error\_file.zip](https://forum.inductiveautomation.com/uploads/short-url/cRTtnfF4EgOK1uIRwLk8OrBLRS6.zip) (965.9 KB) please find the attached Wireshark capture and log. We are using Ignition 8.0.16,and initiating the write via property change script.