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Block::lvsym Dialog::lvsym DynamicModule::lvsym Give::lvsym Module::lvsym

Block::lvsym Dialog::lvsym DynamicModule::lvsym Give::lvsym Module::lvsym

Details

  • This message is generated when the indicated expression from a local variable specification is not a symbol or an assignment to a symbol.
  • The local variable specifications associated with this message are the first argument in Block, DynamicModule, Give and Module, and the value of the DialogSymbols option in Dialog.
  • The first argument in Block, DynamicModule and Module, and the value of the DialogSymbols option in Dialog must be a list of symbols or assignments to symbols.
  • Off[message] switches off the message; On[message] switches it on. For example: Off[Block::lvsym].

Examples

Basic Examples  (1)

The first argument in Block includes an expression that is not a symbol:

Wolfram Language code: Block[{x, f[p_]}, x = 3;f[p_] = p x;{f[1], f[2], f[3]}]

This shows a valid use of local variables in Block:

Wolfram Language code: Block[{x, f}, x = 3;f[p_] = p x;{f[1], f[2], f[3]}]