Sometimes, when you take an item from stock with the TFS command, you get an error saying "External Nesting Result is not available". This occurs when the cut list that was imported from ProNest to Tekla PowerFab could not be completed during the import.

This can happen in the following cases:

• The ProNest job was sent to CNC with the initial nesting, but the material items in Tekla PowerFab needed to be ordered. This means that the inventory did not exist in Tekla PowerFab when ProNest marked this item as cut.
• The ProNest job was sent to CNC multiple times.
• The cut list was imported to Tekla PowerFab before the material that was being cut had been received in the Tekla PowerFab inventory.
• Something in the nest changed in Tekla PowerFab, invalidating the nest. For example, this can happen if the reserved inventory was used for something else.

To fix the error, try the following:

1. Ensure that all inventory needed for the nest is in stock and received in the Tekla PowerFab inventory.
2. In ProNest, resend the job to CNC.
3. Import the cut list to Tekla PowerFab again.

If you continue to face the same error after this, contact support.