New answers tagged arctoolbox
If I understand your question correctly, you may try this: Make copy of line layer Join (non spatial) point layer to line layer by SplitID fields Apply select by attribute on line joined table to "splitID_pole" IS NULL This should select all the duplicate lines b/c their splitID value does not match the point layer splitID value.
An alternative option for your first question would be to use IProgressDialogFactory Interface for the processing dialog. The link above has a sample code for your reference.
ModelBuilder is old, clunky, and is not getting any significant updates with ArcGIS Pro, if this tweet is any indication. I have never been a big fan of it (though begrudgingly still use it when I have to), so you might consider this answer as a sidestepping of the question and a recommendation to look at alternatives. FME is arguably the most obvious ...
The introduction of Python toolboxes at ArcGIS 10.1 for Desktop invalidates your four year old statement that all: Toolboxes, and thus their models, are binary. Standard toolboxes are binary but Python toolboxes (*.pyt) are text files. Consequently, I think Python toolboxes should be considered if version control of source code trumps the requirement ...
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