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Problem: ArcToolbox closes after registering a DLL-based custom tool

Description

After registering a DLL-based custom tool, ArcToolbox crashes on startup.

Cause

ArcToolbox will crash if you specify a preexisting toolset name as part of a new branch in the IArcToolboxTool_TreeviewLocation property of a custom tool.

Solution or Workaround

Use a unique name in the IArcToolboxTool_TreeviewLocation property of any custom tool.

Related Information