question ATF test error 'TypeError: Cannot read properties of undefined (reading 'toString')' was detected in ITSM forum

ATF test error 'TypeError: Cannot read properties of undefined (reading 'toString')' was detected

RenataN — Mon, 29 Jun 2026 14:09:43 GMT

Hi everyone,

I am running ATF tests, and one of them is showing the following error message: "TypeError: Cannot read properties of undefined (reading 'toString')' was detected on the page being tested."

It appears during the step to open an `sc_task`. I analyzed the table configurations but didn't find any code using "toString()" that references an undefined variable.

Could someone please help me resolve this issue?

Thanks.

Re: ATF test error 'TypeError: Cannot read properties of undefined (reading 'toString')' was detect

Tanushree Maiti — Mon, 29 Jun 2026 16:57:57 GMT

Hi @RenataN

Which Servicenow Version currently you are using.

1. post Australia- it seems to be a known issue. Check following post:

https://www.servicenow.com/community/upgrades-and-patching-forum/atf-on-australia-upgrade-failed-because-of-client-script-not-run/m-p/3512463/page/2

2. ALso refer: https://www.servicenow.com/community/developer-forum/quot-type-error-quot-in-atf-test-execution/m-p/2529983

Re: ATF test error 'TypeError: Cannot read properties of undefined (reading 'toString')' was detect

RenataN — Mon, 29 Jun 2026 17:08:20 GMT

I am in the Australia version, and the problem appears in the step: open a new form.
The table in that test is sc_task

I oppened a record manually and works perfectly.