Details

This message is generated when a symbol specified in DeclarePackage already exists.
DeclarePackage is used for causing a package to be loaded automatically when symbols defined in that package are first entered. It will not work as intended if those symbols have already been entered.
Off[message] switches off the message; On[message] switches it on. For example: Off[DeclarePackage::aldec].

Examples

The symbol specified in DeclarePackage is introduced by evaluation of the first input:

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