# Cannot invoke "java.util.List.iterator()" because "" is null

**URL:** <https://community.cdata.com/t/cannot-invoke-java-util-list-iterator-because-is-null/387>\
**Category:** CData Sync\
**Tags:** question, connector\
**Created:** [September 8, 2023, 4:11am UTC](https://community.cdata.com/t/cannot-invoke-java-util-list-iterator-because-is-null/387 "2023-09-08T04:11:06Z")\
**Posts on this page:** 2\
**Page:** 1

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**Author:** ![bkilari](https://avatars.discourse-cdn.com/v4/letter/b/eb8c5e/32.png) [@bkilari](https://community.cdata.com/u/bkilari)\
**Post date:** [September 8, 2023, 4:11am UTC](https://community.cdata.com/t/cannot-invoke-java-util-list-iterator-because-is-null/387/1 "2023-09-08T04:11:07Z")

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Hi Community, new to CData Sync here.

When am trying to extract a certain table from Workday through the inbuilt Workday source connection, an getting the error - [0] Cannot invoke “java.util.List.iterator()” because “” is null

Could anyone help with the error please. Thanks in advance.

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<div class="post-metadata">

**Author:** ![Ethem\_Q](https://sea3.discourse-cdn.com/cdata/user_avatar/community.cdata.com/ethem_q/32/1997_2.png) [@Ethem\_Q](https://community.cdata.com/u/Ethem_Q)\
**Post date:** [September 8, 2023, 8:59pm UTC](https://community.cdata.com/t/cannot-invoke-java-util-list-iterator-because-is-null/387/2 "2023-09-08T20:59:20Z")

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This is actually a known issue which the engineering team has fixed already. You will need to get in touch with the support team in order to get an updated version of the Workday connector for Sync.

Feel free to reach them out at [support@cdata.com](mailto:support@cdata.com) or submit a support ticket here [https://www.cdata.com/support/submit.aspx](https://www.cdata.com/support/submit.aspx) in case you have not done so already.