Hi Jim, thanks for the discussion. What you have stated here was correct for anything created within the last week (March 7 - Mar 13). Last night we pushed a patch that addressed this situation, and I have updated our documentation page for this release: "https://support.workfront.com/hc/en-us/articles/360018813534">
https://support.workfront.com/hc/en-us/articles/360018813534 The important piece of that as far as the API is concerned is this:
When creating these objects via the Workfront API version 10 and earlier, the default value for the "isActive" parameter is true. This is a new field and is not available for you to edit prior to version 11 of the API. Beginning with version 11 you must set the "isActive" parameter to "true" or else the default for creating new objects will be "false". However, a value of "false" does not affect API availability, and anything that you create via the API can also be used via the API regardless of the "isActive" setting. For example, if you create a Company via the API, you can also attach the Company to a Project via the API whether the "isActive" parameter is set to "true" or "false."
FYI, while version 11 is not the officially supported version just yet, it is available to use. Josh Hardman Product Manager, Workfront