# Cannot create unknown type VSoftTechnologies.FinalBuilder.TFS.Workflow
**URL:** https://www.finalbuilder.com/forums/t/cannot-create-unknown-type-vsofttechnologies-finalbuilder-tfs-workflow/1662
**Category:** Discussion
**Created:** [December 8, 2010, 12:45pm UTC](https://www.finalbuilder.com/forums/t/cannot-create-unknown-type-vsofttechnologies-finalbuilder-tfs-workflow/1662 "2010-12-08T12:45:48Z")
**Posts on this page:** 2
**Page:** 1
### Author:  [@deleted\_user](https://www.finalbuilder.com/forums/u/deleted_user)
#### Post date: [December 8, 2010, 12:45pm UTC](https://www.finalbuilder.com/forums/t/cannot-create-unknown-type-vsofttechnologies-finalbuilder-tfs-workflow/1662/1 "2010-12-08T12:45:48Z")
We are evaluating the Final Builder and when simple build configuration is run via TFS, the following error occurs:
_TF215097: An error occurred while initializing a build for build definition \Sprocket\[FB] Test: Cannot create unknown type '{clr-namespace:VSoftTechnologies.FinalBuilder.TFS.Workflow;assembly=FinalBuilder.TFS.Workflow}FinalBuilder'._
Final Builder is installed on both TFS and Build server.
Any ideas?
Thanks,
Z
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### Author:  [@deleted\_user](https://www.finalbuilder.com/forums/u/deleted_user)
#### Post date: [December 8, 2010, 11:23am UTC](https://www.finalbuilder.com/forums/t/cannot-create-unknown-type-vsofttechnologies-finalbuilder-tfs-workflow/1662/2 "2010-12-08T11:23:43Z")
Hi,
Please see this article: [https://www.finalbuilder.com/articles.aspx?ID=43](https://www.finalbuilder.com/articles.aspx?ID=43)
If that doesn’t fix your issue please let me know.
Cheers,
Ben