This error message occurs when a call to procedure or function gives less parameters than specified in the procedure or function declaration.
This can also occur for calls to standard procedures or functions.
program Produce; var X: Real; begin Val('3.141592', X); (*<-- Error message here*) end.
The standard procedure Val has one additional parameter to return an error code in. The example did not supply that parameter.
program Solve; var X: Real; Code: Integer; begin Val('3.141592', X, Code); end.
Typically, you will check the call against the declaration of the procedure called or the help, and you will find you forgot about a parameter you need to supply.
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