We recommend that you check and repair numbering in the model every now and then, especially before producing drawings or reports.

1. On the Drawings & reports tab, click Numbering settings > Numbering settings to open the Numbering Setup dialog box.
2. Ensure that the option Compare to old is selected for New parts.
3. Ensure that one of the following options is selected for Modified parts:

   • Compare to old

   • Keep number if possible

4. Click OK to save the changes.
5. Unless you want to repair the entire model, select the objects whose numbering you want to repair.
6. On the File menu, click Diagnose & repair and select one of the following commands under Numbering:

   • Diagnose and repair numbering: all

     This command numbers all parts and assemblies, even the unmodified ones.

   • Diagnose and repair numbering: series of selected objects

     This command numbers all parts and assemblies that have the same prefix and start number as the selected part.

     Note that Tekla Structures assigns the position number of the oldest part or assembly to all identical parts, even if a newer part or assembly has a smaller position number.

     Tip:

     To manually assign a certain position number on a part or assembly, use the Change number command after repairing numbering in the model.