When I execute the Total pipeline: oCart.RunPipeline(New PipelineInfo("total
"))
in the shopping cart or at checkout I get the following error:

Component Execution failed for component[0x5] hr: 0x80004005 ProgID: Com
merce.SampleRegionalTax.1 Dictionary error: Value for key 'region_code' in d
ictionary '' missing (expected a variant of type 8) (orderform=default)
Description: An unhandled exception occurred during the execution of the cur
rent web request. Please review the stack trace for more information about t
he error and where it originated in the code.

Exception Details: System.Exception: Component Execution failed for componen
t[0x5] hr: 0x80004005 ProgID: Commerce.SampleRegionalTax.1 Dictionary er
ror: Value for key 'region_code' in dictionary '' missing (expected a varian
t of type 8) (orderform=default
)

Thank you in advance for your help

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