Please help me out how to resolve this error
Look at the Tag Templates tab in your import workbook. There needs to be a column named "Tag Name" on that sheet. That particular column can be populated with anything or left empty. But it must be present. If there are other issues revealed after changing that, you can export to the tag templates to get a worksheet with the correct column names.
The provisioning.xml file contains the data points required for each sheet. You can view the column mappings in the Import/Export tool.
Eric Rajala | Consultant
Cohesive
Email: eric.rajala@cohesivegroup.com
www.bentley.com