# OPC-UA - Method call with "complex" input values

**URL:** <https://forum.inductiveautomation.com/t/opc-ua-method-call-with-complex-input-values/31205>\
**Category:** Ignition\
**Created:** [January 10, 2020, 9:35am UTC](https://forum.inductiveautomation.com/t/opc-ua-method-call-with-complex-input-values/31205 "2020-01-10T09:35:35Z")\
**Posts on this page:** 1\
**Showing post:** 25

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**Author:** ![andrea.parola](https://avatars.discourse-cdn.com/v4/letter/a/b9e5f3/32.png) [@andrea.parola](https://forum.inductiveautomation.com/u/andrea.parola)\
**Post date:** [January 18, 2023, 5:30pm UTC](https://forum.inductiveautomation.com/t/opc-ua-method-call-with-complex-input-values/31205/25 "2023-01-18T17:30:58Z")

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Hi,

We had the same problem trying to send the recipe file to a press.  
For us it was fixed in 8.1.15

" 5480: The function system.opcua.callMethod incorrectly encodes ByteString parameters\*\*  
Support coercion of primitive arrays to ByteString when writing to tags or calling methods with ByteString type input arguments."

"[Nightly 8.1 Changelogs - 2022 - #15 by sreis](https://forum.inductiveautomation.com/t/nightly-8-1-changelogs-2022/54636/15)"

give it a try  
Andrea

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