Why am I getting the error "File not found 'Proxies.dcu'"
Answer:
This error can occur when DesignEditors is added to the Uses clause. Do not statically link in the code in the ToolsAPI folder, it is there for reference purposes only. If this is a run time package then you should separate out the design time items and put them into a design time package. You should then add DesignIde.dcp to the requires section of your design time package.