During "Preview Row Counts", Subset throws an error 'ORA-00904: "DIGITS": invalid identifier' around a function called "digits".
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This is resolved in SubSet-22.214.171.124.zip. Please contact CA Support for this version or a newer version. If you are download a GA version, please make sure and verify with CA Support that this version made it into the GA version after July 30, 2018.
Video URL on how to open a Support Case - https://communities.ca.com/videos/5898-demo-how-to-open-a-support-case
You can download the latest version of TDM by following the directions in this document: https://support.ca.com/us/knowledge-base-articles.TEC1903942.html.
To contact support, go to https://www.ca.com/us/services-support/ca-support/contact-support.html.