Determine if a column script is being used in rename dialog

What is the best way to determine if a script which adds columns (in this case, my ebook columns script) is being used in the advanced rename dialog instead of to add columns to a lister?

I've noticed a problem with my script - it crashes in the rename dialog because I use a BusyIndicator when building the columns.

The only way I see to get around this is to check if is true and only use the indicator when it is? Have I missed another option? Thanks.

I think will be 0 in that case.

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That works fine. Thanks Jon.