# Ignition project

**URL:** <https://forum.inductiveautomation.com/t/ignition-project/1566>\
**Category:** Ignition\
**Created:** [February 22, 2010, 3:50pm UTC](https://forum.inductiveautomation.com/t/ignition-project/1566 "2010-02-22T15:50:56Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![Victor](https://avatars.discourse-cdn.com/v4/letter/v/3e96dc/32.png) [@Victor](https://forum.inductiveautomation.com/u/Victor)\
**Post date:** [February 22, 2010, 3:50pm UTC](https://forum.inductiveautomation.com/t/ignition-project/1566/1 "2010-02-22T15:50:56Z")

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I am trying to build a project in ignition and i have experiment problems when i try to define string fields that must write in OPC Tags .  
i receive this error message  
java.sql.SQLException.java.lang.illegalArgumentException unknown type code : -9  
Somebody can help me  
Victor  
Thanks

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**Author:** ![Carl.Gould](https://sea1.discourse-cdn.com/inductiveautomation/user_avatar/forum.inductiveautomation.com/carl.gould/32/7262_2.png) [@Carl.Gould](https://forum.inductiveautomation.com/u/Carl.Gould)\
**Post date:** [February 22, 2010, 9:46pm UTC](https://forum.inductiveautomation.com/t/ignition-project/1566/2 "2010-02-22T21:46:32Z")

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Where are you seeing this error? Is there more to it (a full stack trace?)