To retrieve items from a work queue tagged with 'Gas' or 'Electric' and exclude items tagged with 'Dual', you need to use a tag filter that excludes the 'Dual' tag. In Blue Prism, the correct way to exclude items tagged with 'Dual' is to use the '-' operator before the tag name, like -Dual. This ensures that only items tagged with either 'Gas' or 'Electric' but not 'Dual' are retrieved.

References:

The Blue Prism documentation on work queues and tagging explains how to use the '-' operator to exclude specific tags.