# What is "System Identity Fault"?

**URL:** <https://tech-community.robotics.abb.com/t/what-is-system-identity-fault/1439>\
**Category:** Robot Controller\
**Created:** [September 17, 2007, 9:13pm UTC](https://tech-community.robotics.abb.com/t/what-is-system-identity-fault/1439 "2007-09-17T21:13:13Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![AlexLu](https://avatars.discourse-cdn.com/v4/letter/a/7ea924/32.png) [@AlexLu](https://tech-community.robotics.abb.com/u/AlexLu)\
**Post date:** [September 17, 2007, 9:13pm UTC](https://tech-community.robotics.abb.com/t/what-is-system-identity-fault/1439/1 "2007-09-17T21:13:13Z")

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I got an error on FlexPendant when my program called a system file, which was encoded.

The error was shown as:

Event Message 80001

System identity Fault.

I am wondering what it means.

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**Author:** ![RussD](https://avatars.discourse-cdn.com/v4/letter/r/dec6dc/32.png) [@RussD](https://tech-community.robotics.abb.com/u/RussD)\
**Post date:** [September 17, 2007, 9:30pm UTC](https://tech-community.robotics.abb.com/t/what-is-system-identity-fault/1439/2 "2007-09-17T21:30:55Z")

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80001 is the catch-all error number that is set when the RAPID instruction ErrWrite gets called, and then “System Identity Fault” is probably the header parameter that is specified by the call. It is something unique to the encoded module you are executing, whomever supplied the module to you will have to tell you how to handle it.